It doesnt matter

9.1 PTR still means mid April, call that cycle at least 3 months, that makes July , with a possible 9.1 release August. One of those patch facets is flight, along with all their other content that will be drip fed via timegating. Either way, Shadowlands flight wont come till AT LEAST September..by which time a lot of their playerbase will be sick and fed up.

Their penchant with timegating content is a MASSIVE problem with the playerbase, and I cant see that exodus slowing down any time soon. Not enough content, too little, too late in the game cycle when a lot of your players arent playing or are raid logging because there is zero to do in between ( Hello WOD, raid or die anyone? ).

They have had two expansions since WOD and have learned.....

....NOTHING.