Unlike a lot of people, if they added more levels I’d be fine if they didn’t give you skill points upon completion. Instead, make the max cap way higher than it currently is, like 75 or 100, and make cosmetic rewards. This has 2 benefits:
Like titles you get from completing the challenges, obtaining cosmetics for levels would be a way to show your dedication. If someone has an outfit you get at level 100 for example, you’d know they were a good player.
It’s something to work towards. My biggest fear is that once I complete all the missions, I’ll eventually get bored. If they made the level cap higher and gave free rewards, that would at least be something for end game players to do.