I'd love it if the design team could address this question at some point. I'm not in the habit of using message boards, so apologies if I'm missing some of the etiquette or if this is addressed elsewhere (But I don't think it has been).
If a veteran of RPGs plays PoE 1 with all the latest updates and expansions on the highest difficulty level, its entirely possible for them to advance levels very quickly relative to the core game content, particularly if they seek out and pursue lots of challenging side content. This is paradoxically offset by the frustration of *not getting XP* for kills, either because they hit the XP cap for monsters very quickly (as there are so many enemies on Path of the Damned) or because they out-level hostile NPCs.
The main drawback of this is that it means a large handful of encounters become unchallenging for experienced players. Is this going to be addressed in PoE 2? Obviously its a relatively complex design issue; but, for example, probably the simplest solution would be to add an option that makes you level up more slowly (i.e. by requiring more XP).
I'd love to ask this question directly of someone on the design team; I understand it's only relevant to a small group of veteran players but I just wanted to get this out there publicly.
So excited for PoE 2!
Edit: The title of this post should be: "Question about Making the Game Challenging" but I forgot the "M" and don't know how to fix it!