Why is not having KGW at the start a good thing? Adding it later means a fork and new wallets, etc. Isn't that more of an issue?
The most issue are multipools, they cause difficulty jumps and dump coin price because of autotrades. For now we didn't hear about any SHA3 multipool, so KGW in not necessary. And at start, when hash power of network is growing, usual difficulty retarget will allow to mine a bit more, than with KGW