Not right now, but actually I would if they can't reach the level which they desire through their ambitions. NBK and ALEX are already very capable supportive elements, with NBK playing entry quite a lot these days and ALEX just any given position. RpK is playing very passively, he isn't involved in any opening duels. Granted, he doesn't get all the resources, but neither do the other two. You could easily add someone like kennyS to AWP instead of ZywOo, who would then go back to rifling, which, for anyone who has followed him long enough, he can do just as well or even better than AWPing. My philosophy is that a team should ideally have three players whom you give all resources, while the remaining two take any remaining role. I'd call this a 3-2 balance, with 3 denoting the former and 2 the latter. Vitality have 2-3 balance, which isn't bad, but not ideal in my opinion. Again, I'm not saying they should do this move now. It is desirable, but not necessary, as I call it.
As for NRG, FugLy wasn't that great of a supportive player to begin with. Granted, he did his job, but in my personal opinion, at times it's more important to have an additional fragger, depending on how good the supportive player in question is.