It's having a wide enough enemy roster to fill all the player levels with unique opponents . . . And yes, a big advantage of having enemy types stay constant in power, is that they become a clear indication of how far players have progressed. That effect is greatly dimished if, like you said, same enemies grow with us.
Well said. Yes, the lack of variety can separated from balance but I'm so used to seeing them together than I think of them as traveling together.
In the end it comes down to creating enjoyable content and story, and if player's possible power level can vary too greatly (and not due to roleplaying nor story reasons) then that becomes a problem.
Again, that's well argued but I still get stuck where the rubber meets the road -- I just have more fun playing unbalanced games. BG2 and DOS2 were just more fun than NWN2, IWD2 or PoE1 (combat only -- everything in PoE was great, except combat)
