With the upcoming patch of Wotlk Classic, would Warmane download the new, updated wotlk from Blizzard and update the realms to play on it? The new Wotlk will have good API changes and will support newer hardware and will boost performance. It also comes with nice graphics changes and optimizations.
It's been explained before. At the very least, a new client(3.4.x or newer retail patch) would require a new emulator, a.k.a a lot of work to support the new client. Having seen what 3.4.0 client looks like, there's a lot of UI functions that are completely new to wotlk expansion and not present in current private server wotlk.
It's not impossible, it just requires a lot of work. Probably in some time in the (distant) future.