What hurts the quality of the game is the amount of delays... and that after 3 years we are still on F6 while the original post said something like 1 girl per floor, 1 floor per month (something like that).
If you make some some mini quest where Ethan gets some proof about Crow and Swan, and he confronts them and gets captured, you can easily get him to lvl 1 with one scene where they play with him in a lab or cage and from there you start ToT Chapter Two. Ethan lvl 1, Koda a long forgotten nightmare, delays are gone aswell, everyone is happy. TRUE END