What do you mean by "trivialised a load of content" ? are you skipping all the side missions and encounters ?
If you carry on doing that you just won't be able to do the missions soon. You can't level up fast enough on missions alone.
All I've done is follow the story up until having the three wings open, went back to the initial area and it's ridiculously easy now, judging by your comments it should even out sooner or later then?