Thank you for your input on the matter NeutroniumDragon. The skill cap in my opinion *forces* the player to build characters a certain way. While I agree that it is nice to have a broader build I would then suggest that you get points in each tree, with the one your class is in getting the most points.
That would let players invest into a lot of areas, but I'm not so sure it would be able to handle hybrid classes very well. Plus, you get a wealth of points, although a lot would be useless. Players complain about everything, but here they would complain how that it is 'stupid' to have a ton of points in areas they have no interest in that they can't use for anything else.
I can somewhat agree with your idea to have Social abilities as a separate pool of points. This game is not Fallout and you can't talk your way out of... well any combat areas, in fact. Other than the ones you pointed out as being good (Leadership and Lucky Charm), there's little incentive to invest in Social skills at the expense of ones more practical in combat. If it were a separate pool of points though, I'd suggest only getting 1 a level (maybe 2 if you take a special social-focused Talent), so you have to decide what to focus on.
The warrior skills already include Stuns and Buffs and Debuffs. If that's not enough, why are you opposed to adding a Taunt?