I agree, JDR. Although I like update 2 which gives a lot of info on the envisioned mechanics, some things should have been locked, the mockup screens he talks of should have been ready, etc.
On the other hand I imagine it's a bit of a conundrum for the professional developers - they work with people that get paid, not enthusiastic hobbyists that do stuff for free in their spare time. Most Dev studios don't sit on a lot of cash. So any work they do in preparing a game concept for KS is an investment that puts a strain on the budget, without much of a gauge if it will in the end secure funding. So I guess its always a question of when do you go out to test the waters - do you invest (=risk) a lot to make a great presentation, or do you gamble that a weaker pitch will suffice, giving you some security afterwards?