[@AdvancedJ3lly]

Honestly, best advice... Be in charge and make the call. Leaving too much up to the players will usually derail things sooner or later. Again as you can probably tell, we all have a slightly different image of what it is we want from this. And its impossible to accommodate everything. 

This is especially problematic if it tends to be one or two players consistently getting their way in group decisions like this. it cuts down on a lot of argument to just have the DM make executive calls for the smaller decisions and details.

We are all into 40k enough that it wont drive any of us away from this I would think.