AdEx was -50% after ICO during some days. If project is interesting and good - token will grow up but you need to be patient and wait some time.
Yes, I also share your thoughts but there is a thin line after the ICO that makes Token price fall. Not having an adequate Exchange list, if the developers of the project are responsible for everything they achieve with a successful token sale: Investors and a community that loves the project.
They are not working on what is fundamental the Token Price or it takes more time than scheduled for the token to reach the most important exchange. I think that the project itself and the Token should be the pillar of the project and create the necessary strategies to avoid seeing it fall. Just as a machine is put together to sell the tokens, so should the effort to make the token price worthy of a good project.