PoE relies upon different avenues for end game whether that be mapping, delving etc.
Yes, and there's no identity there, monsters are scaled to whatever is put in the map generator.
D2R introduced terrorized zones to increase replayability of old areas without enforcing immediate level scaling from start. Many solutions to this problem besides the very lazy approach by D4.
That's not a solution, that's mental gimnastycs on your part. Scaling being good or bad according to whatever arbitrary rules you set
Case in point, appreciating that forced bullshit content that they also put in D4 endgame. How's that identity trigger feeling if you go at lvl 10, 20, 30 in same normal terrozone and get monsters based on your level?
I think you either don't understand what level scaling mean or you have different explanation. When I talk about level scaling it is in regard to the player level e.g. a monster level/power/state (whatever the game devs call it) changes not according to a set parameters set beforehand by the difficulty, but by the player's level/power/whatever. I think the technical term they use is Dynamic level scaling. You technically have scaling in all ARPGs where there is difficulty levels, because you are scaling a normal monster's stats to that game's difficulty curve (been map levels in PoE, area level in D2 or world difficulty in vanilla D3), but when you enter a zone when you are level 10 it will have the same scaling if you entered it at level 40.
There's no misunderstanding. In d3 vanilla campaign you didn't have the zones set to a level like in PoE, you had a linear campaign where monster scaled to your level if you were in that difficulty's range (1-30, 30-50, 50-60? maybe, don't remember exactly). Inferno had special scaling of 61 act1, 62 act2, 63 act3+4 with very high differences each lvl.
The whole genre uses that for a while now. They usually have linear campaigns though, so they can use some presets there. D4 wanted "open world" and gives you more freedom in what you do for first part of leveling. (D3 did linear campaign with level scaling but apparently if some youtube celebrity doesn't QQ about it, it goes unnoticed).
At the end it's personal preference (linear + static levels vs open + scaling) and barely makes any difference in the overall quality of the game (unless you are some autistic "MUH D2" fucktard). D4 has issues atm with the end game content, that's the big deal.
