Oh c'mon. Open your eyes to reality, "PoW only" means a disadvantage, not an advantage.

Anyway, there is nothing innovative in your "PoW only thing" because it's already introduced by Satoshi. So, we have some proof-of-stake systems with SHA3 released months and years before CL and the security model doesn't matter here. That's why "because of SHA3" statement makes no sense.

P.S. Don't use promt or google translate, it would be better to dedicate some time for reading the textbooks and be prepared to participate with what you learned.