I think the issue you have with FU when you try and import it into the RPG is essentially the same problem you have when you hyper-optimize any character. When combat comes around the GM will be hard-pressed to throw something at you you'd find challenging. When a non-combat encounter shows up though, you're just another nub throwing dice...until you get frustrated and turn it into a combat encounter.
Not saying you couldn't do a fun FU adventure or even a short campaign if you planned it well from the start and ironed out the kinks early. Just that it seems like a concept that would run out of steam after the novelty wore off. Part of the video game is the spectacle, and that's a hard thing to consistently translate into the RPG for more then about three or four sessions.
Also unless FU3 is about to come out an nobody told me, I see no immediate motivation for FFG to support it, much less make it part of a core rule book.




