Exp rate is WAY too low. There are too little quests and I wouldn't mind the grind IF the mobs weren't hitting that hard. Public Events bosses are mostly impossible to solo (at later levels). At some point its hardly possible to kill group of mobs to grind your level. Besides, even mobs don't give that much experience. It's horrendous to see random road quests giving 10% of your level, and regular quests giving barely 4%. I do understand you do not want people to get to current cap (40) too soon, but don't make it too long either. Please reconsider.
I am level 20 right now (guardian.. so can't imagine what squishy classes are going through) and I am so exhausted I'm considering quitting at this point. No fun, too much struggle. If you don't change it, many players who wanted to casually play will quit.
And I was really excited for this reboot.