A lot of Shadowlands feels contrived and forced. However, if you start to look at it from the perspective of the developers who probably want to update their 17 year old game, the plot point of a mega Lich King with the keys to remake reality starts to make a lot more sense. (BTW, sidenote: I have a feeling the Jailer won't be choosing how to remake the reality, and the main characters will just come together to "fix" a few of their past mistakes - Thrall and Garrosh/Draenor, Sylvanas and Teldrassil, Jaina and stopping Arthas at Strath etc).
1) They don't want to do a WoW 2.0 and segment the playerbase. Both EQ/EQ2 and Destiny 1/2 already did this and the issues with it are quite clear.
2) They NEED to make MASSIVE updates to the game, one of the primary faction capitals of Stormwind looks like it's made out of Legos comparatively to any other modern WoW city.
3) A zillion loose ends with time period phasing. Does it make sense to update Outland when you have Draenor? Bronze Dragonflight NPCs everywhere that you talk to for different phases.
4) WoW's file size is getting larger and larger as we speak. Destiny 2 showed us that companies are willing to "vault" content to preserve file size. This is horrible in Destiny 2 in my opinion, but WoW has WoW Classic to hold and preserve the old zones. They're also clearly going to continue progressing classic servers so everyone will always get to play old stuff whenever they want - if they follow the EverQuest path you can have multiple server sets running in parallel at different chronological periods so everyone has access to a game state they want.
5) If you look at what the game lacks from the perspective of an entire team knowing they're going to be making dramatic updates. No player housing yet, when every other MMO has it, starts to make sense if they knew they were building up to a massive reconstruction of the game. These are massive player investments. Who the hell would make a house in Stormwind or Silvermoon if you had an option to do it in Suramar or updated Dalaran?
6) Players wondered where all the big class updates are, it makes sense to wait until something like this happens to make dramatic changes.
Does anyone else feel this makes the revamp way more likely given what we know what this is all building up to? The developers have led us, however confusingly, to a point where we have a method to remake reality, seems crazy they would squander it in the light of how badly WoW needs to be refreshed updated.