The idea is in fact the last thing I look at because if there is no experienced team, roadmap, whitepaper etc. The idea is itself useless, just an idea.
good point. If the project is lead by an inexperienced team or if the direction of the project is not articulated, then, no matter how good the idea is, the whole thing would appear unstable.
I think, it will be well-founded doubts. And it is important who will judge.