Agree. I would suggest something like a limit of 2 for "major" L2's (BASE, ARB, OP) and 1 for each other L2  


I'm basing this off the "top 3" having over 10% of the market share, while every other L2 has less than 5% of market share.

https://preview.redd.it/2ith42ippftd1.png?width=1228&format=png&auto=webp&s=c54145c07cba3530f9b614967289bab3031aed3d

!tip 1