There are ways to level up with not too much effort. For example doing some of the daily roulettes (like PvP frontline, leveling or msq) or this random weekly sticker album. But...

..., and imo it's a big but(t)!
For longterm players, the always exactly repeating grind to level up stuff 10 levels again every single expansion..., becomes very boring at some point.

My motivation is gone. :c