I see your point Ragnarok, but level capping like that just feels like such an incredibly blunt force solution for a problem that many other games in this genre have worked out more elegant solutions to. Also, it's really easy to get to level 4 quite quickly. There are folks who can kill all the monsters on the Nautiloid and go up several levels just from that. Furthermore, it's not that hard to hit level 5 before you deal with all the stuff related to the grove.