ethereum is a good altcoins but i don't see them transparent in development, even the rumored eth 2.0 will launch, not even launch as of today. In my opinion, the criteria as a good altcoin are having a large community, high security and adoption.
They do not have to be, newbies all think that project's all have leads but that is not the case. There is a foundation that "offers" ideas for ethereum to move to, and they are not making those changes themselves. So if they do 2.0 and we all decline? They can't make that into a reality.
This isn't some newbie token that the creators have full ownership over and can change whatever they want to, it is something that mainly foundation builds on top of and then asks people to either accept it or not. If you are not aware of what they are doing right now, that is not important because when they offer it, we have a chance to decline it and move on without whatever they suggest.