2, more importantly, as a PoW coin, there's no possibility to clone a BTC due to its huge hashing rate.
While Etherium can be easily copied after it changed to PoS.
I think it is better to keep Ethereum as a PoW for a few more years so that its user base can be increased further as there are more miners.
PoW mining is a PR problem if you want to reach a larger audience.