Reasonable solutions to overpopulation lag

[Mariehu]

This project needs specific Asian servers. Blizzard even did this.

Only flaw with your logic is that they wont swap to the asia server, because they play here to make a living.

Why level, farm, play AH etc on asian server when u can get 10-15euros per 100gold on this server and probably less than 10% of the same value on the china one?

Many of them only play here because it's a business opportunity for them

[Syrma]

Fraction of people could always migrate to another server, which should reduce the lag.

[Gokan]

Maybe another server with same progress as Nostalrius PvP and free migrations. We could also add some kind of PvP interserver which was available in late Vanilla. My 2 cents ;p