I have to disagree with giving a PC Inquisitor DW weapons, though- I think that would eat in to the SM players' strength. In a mixed party, the SMs are the 'muscle' and the Inquisitor should be the 'brains', not 'also muscle, with a bunch of other benefits'.
Mhmm. How would the Inquisitor qualify as "muscle" if he lacks the Space Marines' Unnaturals? He is not on the same footing when it comes to either melee combat or taking hits. Is it really wrong for the player to have fun in fights, too, by leaving him a single area where he or she can at least feel just as useful? The character will still be squishy, and I think this would influence combat sufficiently to preserve the Marines' speciality.
Deathwatch is a game focused on combat. To me, it would seem super-lame if one character would be gimped 90% of the time, and during the remaining 20 minutes he gets to show off his "awesome" knowledge skills by solving some token riddle whilst the others stand around looking bored. This is the worst case scenario, mind you, but an easy trap to walk into.
A good game should aim to make every single character/player feel valuable as much as possible, not segregate a session into a "Marine part" and an "Inquisitor part" where the respective other gets to feel like an adjunct. This means including events both types of characters have a chance to influence what's happening equally. And this means events where the Marines' own knowledge skills and Chapter-specific interaction come into play as well, rather than flat out saying something like "the Astartes are doing the combat, the Inquisitor is there for the science and the talky bits - and don't you dare try to step out of line".
It's probably a question of how we envision a game like that to work out, though. I just couldn't imagine it any other way, so perhaps that is my weakness.
In fact, I don't think the Watch Captain has to state during briefing that the Inq has the authority, it's kinda obvious.
How would it be obvious? The Inquisition and Deathwatch in this game work differently than in the source material you may be referring to. In the core rulebook, they are specifically said to be equal partners - the default relationship would thus be one where none commands the other, similar to a Dark Heresy Acolyte cell that lacks a clear leader. The characters will probably voice suggestions, and then either go with one or not.
Edited by Lynata, 23 April 2014 - 08:20 PM.