Even if you did nothing else, the game would feel complete if there was an "end game" option at the altar after killing Legion. I'm looking forward to the next installment.
I actually did not intend to extend the game so soon yet, but there a lot of of good ideas coming in from Reddit, which gave me inspiration to bring it further. Among the few "itches" of players that will be addressed to in the coming version are: exploring more non-linear playthrough, more classes to absorb, transition of base classes to higher form of classes (e.g. Bat > Vampire, Wolf > Werewolf, etc), implementation of good vs evil traits, actions having impact on subsequent loops, etc etc