Basic straight forward question, i think the sharding and CRZ need to be removed from the game personally and we need to bring back communities.
We are playing a MMORPG and we shouldn't be divided in 500 realms.
It is good to have many realms, but WoW has TOOOOOO many at this point, we could easily merge 80% and still have a good chunk of realms.
I think the point of "Well people might lose their name and hate it" is a very bad reason to not merge realms at this point. Most people are adults and should understand these things may happen in a game's lifetime.