You'll find you get plenty of these stats on gear and from traits, but I feel the game doesn't require min/maxing from a combat perspective. Spending points in things that make the non-combat stuff more enjoyable . . or simply less agonizing, are very much worthwhile IMO.
Wonderful reply, Nicdanger, and one I'll certainly take to heart. These are my thoughts exactly -- if it makes the game more "realistic" and mitigates frustration (like attacking a locked door 20 times), I'm all for it unless every last point must be allocated to combat to be successful (in which case Larian did something very, very wrong).
- Geezer