That's a true advantage to got a leader indeed... It prevents any divisions of point of view or of development as long as he's not making too crazy decisions.
There are advantages to multiple of the best development minds maintaining bitcoin in consensus. Ethereum investors are going to be in for a rollercoaster when the token starts being used in the wild and Vitalik sets off the bomb to switch from PoW to an untested (in the real world) PoS.
It is one hell of a gamble for a future in which there are no good use cases for the token.