Don't get me wrong, I backed without even reading the Kickstarter - it's Obsidian making a game they want to make, so i have faith.
I just think they firstly need to say what makes the setting appealing to them - why have they chosen, so far, generic-sounding fantasy, what's going to make that special? They are not constrained by publishers, so they've actively chosen this setting as something more appealing over something more immediately unique (Eg. Planescape). I want to know why, though.
Secondly, the tiers are not so great at the level I am looking to pledge. I would have given more than $35 if there had been something there for me (I'm an international customer).
Thirdly, IMO RTwP was never a fun combat system. I remember the debates and arguments in the Black Isle days about RTwP - the 'hardcore' wanted turnbased combat in their games and saw RTwP as a concession to publisher demands. Fallout: Tactics was heavily criticised for introducing a real-time option.
Anyway - the bottom line is this is a game Obsidian want to make, so I'm backing Obsidian, rather than the game, at the moment. No excuses allowed if it's not great - this game will define Obsidian, for me.