Well, the 500 Algorithms in ZZ is if you want a 1LLL, otherwise you just need 7 O(C)LL's and 21 PLL's for the equivalent 2LLL when comparing to CFOP's 2LLL, which is 28 Algorithms (ZZ) to 78 Algorithms (CFOP).
In the Reddit Forum Post Felik's says that <R, U, L> Gen isn't very good for 2H, so...