My hybrid has at least 100 wpf in 3 weapons, yet I'm playing him as a pure 2hander atm and doing quite well scorewise. If I wanted to, I could play pure 1h/shield or xbowman and probably do equally well. Other than having a lower ps then I'd like, I really haven't sacrificed anything in terms of my killing potential by being having a hybrid. Rather, if I played as an actual xbowman/2hander I'd be even more effective.
So, there is very slight negatives to being a hybrid atm (minor sacrifice of stats/skills), and very high positives (effective in most situations).