but the purpose is to change the environment by obsoleting them.
THIS. I'm starting to getting tired of how they are ruining the game by making old heroes useless, its funny how in this page you see panda and erik, lol, anyone use them?
Gus and Elric are good heroes actually...
I'm more worried about old heroes who were obsolete (and there are a lot of them) and remain obsolete after they are awakened, since they will probably never be looked by Lilith again, or at least not anytime soon.
Alana is a good example, what a HORRIBLE hero for arena, completely useless. While she used to be good for HOL and Raids the recently released heroes made her completely irrelevant as you can only bring 5 heroes and there is no spot for her. Mortus is another hero that has been made obsolete, this one was actually a good awakened hero for some time, but again the recently released heroes made him obsolete in arena, and arena was the only thing he was good for.