Why not having power leveling? It's a choice of the player afterall.
I choose to play the game without any power leveling, so yep, I like to grow with my character. One thing I must say is that there is this gap between L25-30 and L45, where you must go on with leves and monster grinding, which is only tedious and unfun.
Something that we could need is more dungeons around those levels, maybe L35 and L40 Shposhae-like dungeons. It was so much fun to wander around Shposhae, and I want to go inside something else that is the same thing, just harder!