I have some questions regarding the future of Tauri, especially in how you're planning to deal with simultaneously making PTE on Crystalsong and Legion, and there are some things that for the life of me, I just cannot grasp.
Is the plan really to "script" (I know it's not the right word Aithne) two expansions at the same time?
I don't think I'm saying anything false if I claim that Tauri needs time to get content working properly, and there's certainly nothing wrong with that, because as we've seen in T15 and T16, the content after a couple months is flawless. But the issue now is that, you're somehow gonna have to make Legion and Cataclysm/Wrath of the Lich King, virtually at the same speed as you've made a single expansion previously. Nobody from the "FRESH" community is going to stay on Crystalsong farming ICC for 2 years while you script Legion, and then another year to get Cataclysm working properly. And neither can you do the entire Wrath of the Lich King before Legion, because I think it's relatively obvious that we can't farm Siege of Orgrimmar until 2022, and given, Legion has far more content than any expansion you've made previously (traits, etc), so it might even take longer.
In addition, what is the plan after Legion?
I very much doubt you're going to do Battle for Azeroth, so either we hope that Shadowlands is good, or we.. stay on Legion practically forever? I cannot possibly be alone in thinking that the obvious, optimal choice is to go Legion, and then start a new PTE after Legion is over, starting from Wrath, because in doing what you're doing right now, you're just splitting the playerbase, and both servers will be equally dead. Making a new PTE when all the content has been done, uniting the playerbase behind a new realm and leaving the old one behind, is just the most logical step forward, in my opinion.
And beyond all this, I don't think we can look past how Crystalsong is currently. There's no feasible way you're going to get all the major issues worked out before the launch in two weeks, and given how the large part of the newcomers are expecting a flawless Wrath of the Lich King, it'll be a flop.
Honestly, it isn't too late to call Wrath of the Lich King off. The work you've put in hasn't been wasted.. It could just be postponed until a better time presents itself, because with what you're doing right now, you're just shooting yourself (and your relatively loyal playerbase) in the foot.