I think they've been pretty generous so far introducing higher level, and lower level of similar content. Sadly it's impossible to have perfect balance that will suit everyone's needs. It is after all a genre that once started off catering to hardcore players, that's branched off into appealing to casual players but even then not every new content can be perfect for everyone. That's sadly just the way it's going to be

But again they've been pretty generous. Leves have difficulty levels, dungeons have a lower and higher alternative etc..