I bought the first at Arkham Nights, and bought the 3rd while visiting family during the Easter weekend.
Since I missed the 2nd (Ire of the Void), I decided (with my parents' consent) to pre-order through FFG and have my parents pick them up for me as they come out since they live in the area.  Since they sell out so quickly, I wanted to be sure to get the rest.
So, for now, I'll just be missing Norman.
I'm glad the 3rd was still there since I play Roland quite a bit and it will be nice to use the more forgiving weakness....though as soon as the new set comes out, I plan to try out Leo.  Will be fun to see which I prefer playing. (in 2-player games)

I believe this is the link you were looking for: 
https://www.boardgamegeek.com/filepage/141939/deckbuilding-options-investigators

Yep, it's on their facebook too:
 

Most of the signature weaknesses are worse than the benefit their signature asset gives so I doubt I will ever play with both sets unless I am just doing it for fun.  I can't see it helping for the most part unless my character manipulates the deck a lot (to avoid weaknesses).

Most of the signature weaknesses are worse than the benefit their signature asset gives so I doubt I will ever play with both sets unless I am just doing it for fun.  I can't see it helping for the most part unless my character manipulates the deck a lot (to avoid weaknesses).

I agree. Roland is probably the easiest to Solo with as long as you add cards to help his low sanity.
Basically, to solo well, you need someone capable of getting clues and fighting monsters well. 
I have solo-ed well with Agnes, but she's tough as you need to be sure to have both offensive spell cards and also cards to assist getting clues.  If she does though, she really can do well.  Having 5 Willpower used for her fight (or also for investigation if you are playing Dunwich), is just great.  She's a high risk kind of player.
Marie Lambeau (promo investigator) is a bit less risky as she has a stat of 4 in both Willpower and Investigation so she only needs to get spell cards to help her use that Willpower to attack since her investigation is already pretty good.  Plus, her ability can let her get through cards faster (as long as used strategically; I try to add a Doom to a card that will eventually get discarded so it won't advance the Agenda prematurely)
As a side note, after playing Skids, I noticed that he struggled much more than Roland when fighting, even when using the same weapon as Roland.  That single extra point in Combat stat really helps.  I found myself having to boost Skids with cards from my hand (skill cards, etc) much more for that reason.
(I have not played most Dunwich characters yet so I am mostly just discussing the base game investigators). 
Any one can be solo-ed with, but without a good and quick way to get those clues and dispose of monsters, it will be a tough game.  You may even wish to play on the easy setting if you have a character that is not consistent  at both unless you really want the challenge.  (After going through the game once or twice, I actually enjoy the challenge of trying to have such characters struggle through on standard mode, but it can be a real struggle at times!)

It reminds me of a spreadsheet I made for an old CCG (only one I'd ever owned or played - not Magic and won't tell you which!)
It had many categories of cards (such as we do with allies, items, etc).
I made a spreadsheet that let you type in the amount of each type you wanted in a deck, and then it generated a random deck for you. (also had to select which of the energy types - so class in our case).
In that game the maximum for each type varied, but in this game you'd still need something to indicate if it is a unique ally as you would not want to force them to have 2 in that case (though I guess you could still as it would double the odds of getting it quicker and give you more health/sanity to use up.
Anyway, it's definitely do-able.  I may even consider doing it for this game (making a random deck based on certain inputs - or if blank, completely random).  But, for now, I'm not bored with it.  I did it for that CCG because it was such a small CCG (only 2 sets ever released) that the same cards were picked all the time.  This made it much more fun, but could sometimes be brutal to use!
It was great to try out new cards though.  It really made the game different.
And, in this game, I may do the same.  If I feel my deck is too awful, I'll just play on easy.  (will post if I ever get up the ambition to do so)

What did people think?

My friend and I have both really enjoyed it so far.  My friend has played once (first scenario).  I've played the first scenario 3 times and the second and third scenarios once. (those last scenarios were done solo with Agnes; I've partnered with Skids on first scenario those 2 other times)

 

Fun in groups?  solo?

I have had fun in all cases, solo and in group.  I am curious to see how it will go with a partner on the last 2 scenarios.

 

Improvements from LOTR?

No comment (Never played LOTR)

 

Too hard?  too easy?

At this point, it's just about right for me.  It was very tough to win with Agnes going solo, but I came very close (one bad chaos token pull away).  Instead, I got a neutral condition (neither win nor lose).

 

I definitely look forward to expansions and to getting a second base set so that I can play with 3 players or getting the expansion set.

What did people think?

My friend and I have both really enjoyed it so far.  My friend has played once (first scenario).  I've played the first scenario 3 times and the second and third scenarios once. (those last scenarios were done solo with Agnes; I've partnered with Skids on first scenario those 2 other times)

 

Fun in groups?  solo?

I have had fun in all cases, solo and in group.  I am curious to see how it will go with a partner on the last 2 scenarios.

 

Improvements from LOTR?

No comment (Never played LOTR)

 

Too hard?  too easy?

At this point, it's just about right for me.  It was very tough to win with Agnes going solo, but I came very close (one bad chaos token pull away).  Instead, I got a neutral condition (neither win nor lose).

 

I definitely look forward to expansions and to getting a second base set so that I can play with 3 players or getting the expansion set.

I noticed that some of the investigators have gone out of stock and was wondering if they would ever be reprinted.  I'll have to keep my eye on the reprint schedule.
 
Luckily I noticed and snagged one from an OLGS when I noticed FFG went out (and that store only had 2 left...the next day zero).  Now I've only seen them sold at a marked up price.
 
I was mostly wondering because it would let me know how the monsters will be handled too.  I haven't bought those yet, but may....just trying to see if I need to act with the same urgency.