Its not really a big problem. It something that has happened every major content patch and launch since the start of the game on large realms. Many having there ques for months after the launch if not entire xpacs. Never has blizzard given a statement about ques.
Ques are a EXPECTED part of being on a large realm and speaking of one who has been on a larger realm since the end of og wrath (illidan to be exact) ques are par for the course. Don’t like it leave the large realms. That is the fix.
Blizzard has constantly did what they could to make que times as small as possible and realms as stable as possible with as many connections as possible as its good business to. As they have stated many times in the past even with layers servers have clear limits and there will be ques when past those limits.
We the players picked to be on these realms and as such we have to deal with the expected result ques. Just like we have literally every single content patch.
Blizzard has given you a way off the servers which is MORE then they have done in the past. This is already enough.
Also just since another game that has entirely different server structure and code can do something doesn’t make it realistically or practically possible to do on another game.