I can't think of a single game that manages to have enemies correspond to your level rather than area or story progression actually contribute to the game. It just makes trying to get better gear ultimately a pointless task because the enemies get strong at the same rate so you might as well stay weak.
borderlands 2 was fine in that way for while, i think you should stop playing it over and over again before you get to the point where it breaks anyway so it's no a big deal unless you obsess
It did have the opposite design where if you fought enemies that were higher level than you, not only did they have more health and do more damage, but you were arbitrarily limited in how much damage you could do.
oh yeah.. they could've made that dropoff less harsh i think, let us struggle to beat an enemy that's over-leveled and then schlep around some gear we can't use for 10 levels if we want, dammit. I guess they didn't because that breaks their gameplay loop but you'd still re-engage with it along the way and it would make some challenge runs more feasible.