I have to echo a previous poster who said they'd like to see the Force system replace D&D's current Psionics system. Although, in that case, what I'd do is make the Sorcerer a "Force" based class, rather than using Vancian spells. Same with the Paladin, Bard and Druid, keeping only the Cleric and Wizard using Vancian magic (as it's rather iconic to the game). Following Castles & Crusades, remove magic from the Ranger entirely to make him more of a hunter/Scout class.
Heck, I'd like to see things compressed a bit: Fighter, Scout, Cleric, Druid, Wizard, Sorcerer. Bards and Rogues could come from the Fighter or Scout class, Paladins would be Fighters with "Force" abilities.
I love the skill system, but am wary of the new damage system. Talent trees are a great addition I'd love to see. I could picture a Fighter class with trees for dealing damage, gaining defensive skills, or gaining combat-oriented "Force" powers as a Paladin.