Started a new playthrough of DA2 yesterday, and am baffled that I haven't noticed this before - but the weapons of DA2 are ridiculously big. The sword Carver starts with looks like it is about to topple him at times. :-P
Well, 2-handed swords in particular need this, perhaps. There's no need to go overboard with this; a slight decrease of about 5-10% should do the trick, without weapons becoming too small instead.
There is a mod that addresses this for DAO/DAA, but I haven't been able to find any for DA2.