The thing is, leveling felt GOOD before WoD. From Vanilla to Wrath you got a talent point every level which made your character feel like they were evolving constantly. The OG talent tree does have issues though, which Cata, imo, largely fixed.
In Cataclysm leveling still felt good because every few levels gave you a talent point, which was MUCH more impactful than it used to be with fewer filler talents and less ranks (EG: In vanilla 1 point would get you 0.5% Crit, in Cata you’d get 2.5%). Cataclysm also baked many must have talents from before into the baseline spellbook. Whereas now they’re doing the opposite, pruning abilities only to re-add them as talents. WHY IS CONSECRATE A TALENT?! WHY IS IT COMPETING WITH WAKE OF ASHES?!
Ahem. Anyway. In MoP the overhauled talents were less frequent and had it’s own issues but at least you were still getting plenty of abilities as you leveled. And I believe you had one or two new abilities as you went 85-90.
WoD however was when things started getting weird. They took out a few abilities, and gave us ‘perks’ as new passives while we went 90-100. Sure. Not ideal but better than nothing.
Then we got to Legion, where they went whole hog on ‘spec fantasy’. Turning specs into miniclasses. This is where it started getting dreadful. Suddenly as a mage you UNLEARN abilities if you changed spec at lv15, losing frostbolt to get fire based stuff if you went Fire, for example. Suddenly every spec had 1/3rd of the abilities it used to. We also didn’t gain anything new baseline besides a talent row from 100-110. But artifacts more or less filled that gap… except now they don’t. So you earn nothing from 100-110 baseline. But at the time nobody noticed because of artifact traits, and leveling 1-100 being at light speed.
But then leveling got nerfed… and suddenly people realised they’d go stretches of 5, 10, 15, 20 or more levels of getting NOTHING new aside from the odd talent. I’m pretty sure S.Priest has a 40 level gap where they get no new abilities or passives besides their talents every 15 levels. Some classes get all their core abilities by lv20 and then never change in any meaningful way all the way to 120 (MM Hunter says hi, was stunned when I was leveling one and found out my rotation is near identical at end game). Others are literally useless until 60, 80, whatever. (Outlaw comes to mind, as well as Guardian/Brewmaster being super fragile until they get their mastery).
Leveling in WoW is a massive slog. I get that before it was too fast, and I was even in favour of it getting reigned in SO LONG AS LEVELING BECAME MEANINGFUL AGAIN. But it hasn’t.
Meanwhile, every other MMO seems to have it figured out.
XIV at worst gives you a new ability every 5 levels, then every 2 from lv50 onwards. Your class gradually feels like it’s growing more intricate as you go, rather than feeling like you’re utterly gimped until X level, nor do you feel identical from 20-70.
TESO gives you a skill and attribute point every level, and a huge bundle of them at every milestone (Usually in 5s or 10s). The milestones in particular feel fantastic and give you a huge power surge, like when you got talent points in Cata. Particularly as you evolve skills. TESO uses level scaling to a bigger extreme than WoW, but you still feel stronger as you can kill more stuff quicker as you level your skills. Rather than feeling stagnant end to end.
SWTOR isn’t afraid to give you a wealth of abilities by lv15, and gradually expands on those with new passives and abilities every few levels all the way to 70. It did ditch the old fashioned talent trees in favour of ‘utility points’, which don’t directly increase damage but instead offer survivability or buffs of your choosing every so often. And you can view the class/specialisation track to see exactly what you will learn and when. WoW meanwhile clutches it’s chest at the thought of giving you more than 5 abilities at lv20. Probably because if it did then you’d earn even less for the next 100 levels.
GW2, similar to TESO, gives you hero points every level. And every so often gives chunks of them at certain milestones. Both games also offer you points for exploring or completing certain activities, urging you to go off the beaten path and explore. Even if you don’t get XP from it, it becomes worth doing more than just the optimal XP per hour route.
And so on and so forth.
tl;dr/Peeve: WoW’s leveling is