No matter where he will work and what position will occupy. For us the most important thing to Ethereum has evolved. Its main disadvantage about is the bad scalability. If he can solve the issue with the speed of transactions, Ethereum will fly like a rocket. It will be a success.
I very much agree with you, and after I investigated a lot of coins, I fell in love with Ethereum deeply.
However, I think in addition to the transaction speed, if the transaction fee can be substantially reduced, then can fly like a rocket.