I wouldn’t mind a level cap tied to the arena. I had a very hard time breaking into Lockdown because of massively overpowered creatures, and I can’t get above 2600 for the same reason. Especially frustrating when every player had a completely identical team for a while there (Stygimoloch, Alanqa, Suchotator, T-Rex) - although I’d take that again if it meant something other than the new standard team of Indominus, Velociraptor, Miragaia and Dracoceratops, all level 20.
The current matching algorithm definitely makes it very easy for advanced players to crush newer players which isn’t a lot of fun. I don’t bother to battle at all anymore (just focus on collecting) and I’m sure there are plenty of other players ready to give up altogether.
A level cap would go a long way to helping keep the experience enjoyable.