Dawntrail has a lot of weight to bear on its shoulders. EW is "good" yet not many play it now during patches. WoW Dragonflight is "good" yet the amount of players is also low and more probably are in the Classic versions, especially now with Hardcore and Season later this year.

And where is the EU's new data center we were supposed to get this summer? Did the traffic was overestimated and it's not needed? (not like mega-queues disappeared like a month after expansion and will be the same at the Dawntrail launch).

Start playing a week or two before the expansion launch, do all MSQ X.1-X.55 content, then play Y.0 and quit until 1-2 weeks before the next expansion and repeat.