There is a roadmap and investors can check haw the project follows roadmap. If project does not follow the roadmap or it changes roadmap it is not good for investors.
Now nobody follows roadmap. And it does not depends from the team of the project. Even Telegram does not follow the roadmap and during IEO Telegram collected much more money than Romad.
Sometimes its interesting to get an outside opinion and make assumptions is perfectly acceptable, especially the human factor to panic, unfortunately the roadmap is often corrected, this is normal for projects and not familiar to investors.