I won't go into too much detail, but reviving AS servers would take a lot of work and money. There'd be a lot more languages that would need to be learned by a staff member -- or hire staff members that know the language -- to be able to understand when users are breaking rules in chat. The money is also a huge detail to take into consideration. MCGamer's servers are not cheap to host; I don't know much about hosting, so I won't embarrass myself with details -- let's just leave it at the fact that it ain't cheap.
Also, there isn't much of a demand for AS servers. While it is true that people do want the Asian servers to come back, it really isn't enough people to achieve their goal of reviving the AS servers. Sorry, but that's about as simple as it gets.
I'd like to see them return, but being logical, they more than likely won't.