I think they handled it right here is why, lets say they transfered to low pop servers and gave multiple choices, chances are they would run into the low pop issue again in the future. That would mean more transfers/merges which would ultimately bring on more QQ BW has no clue ect ect ect bottom line is it would look bad. Now with the method they are using servers are busy and if they become to overpopulated they can brag that they are flourishing and need to open more servers because their subs are increasing which makes them look good.
Its all perception.