Along class reboots please rework their awakening/succession as well. A lot of them are too simplistic and go like "kill three different packs, get awakening weapon, practice, done". Some folk might prefer a quick questline but it ruins the lore and depth of classes. The awak/succ questline of the sage for example is much more satisfying because it has an actual story and purpose for killing packs.
Also many classes' questlines are tied to early game locations for convenience or because the appropriate areas weren't available on release, when it doesn't make sense. For example, Ranger/Archer/Dk questlines should happen in the elf territories, not Mediah. Musa is mentioned as an oriental, but there is no orient released and he isn't Valencian, etc.
TL;DR more meaningful questlines for each class would be appropriate alongside class reboots.
It would have close to zero return value for the effort, and most wouldn't even like if it would take lot of time to do them.
They could improve it tho, if you would not neeed to go into the literal end of world for it, that would be nice, liek going back to oliva for the mystic one, then back to mediah.
It would also be nice to have some technical aspects looked at as well.
I didn't know Archer came with access to awakening at lv1. Guess whose seasonal archer was stuck with a 10 AP greatbow until "Ascension" Quest? :,)