As a long-time 1st Ed. player (always a Hero, btw) we adopted a couple of house rules to add to our personal enjoyment of the great game.
We typically played 1OL vs 4Heroes (sometimes 3…) and at least 3 of us players were the same, the OL and 2 of us Heroes.
We loved the exploration aspect of the map, so we would allow the OL to "reveal" the map as we opened doors and discovered new areas. This gave him a little advantage, but we didn't mind. The fog of war was fun and thematic to us.
Our small balance attempt for this was that we, the Heroes, got to draw 3 from the huge pile and pick our favorite amongst the 3, forming the team.
I think I'll miss that…and the fact that you were "forced" to use someone you may not have been totally comfortable with…or knew how to exploit
So, once the Conversion Kit is in my hot, chunky hands, I think we'll stick to that method.
Every Hero draws 3 and chooses their favorite. Otherwise…certain Heroes may never get used!