1. Revaluation of the current project cost in the ICO phase
I don't know what you mean by re-evaluation.
2. Inflationary factor, a large percentage of tokens not participating in the distribution
Of course it will take some time, specially if the token is like billions in supply.
3. The project and the Team do not have significant incentives for development, money is received you can relax.
Actually if the people behind are really enjoying the project or at least think that their project will disrupt the target niche or industry, then they don't think of incentives but rather how the will contribute. If they relax, then it's their downfall. Or maybe they don't really think that the project has a bright future if they don't improved on it.