How about personal faction abilities are removed and instead you have group faction abilities.
What about your own research projects?
What ever your group has, you get to use. Let's say that the group has a 20% Unhide that is also what you get as well (as long as you are part of that group).
The downside, of course, is that the cost to increase the group ability is higher... (5 x current?)
Upside, is that newer members would get benefit of group ability and the group would start working towards a common goal.