No I’m pretty sure it didn’t.
There was an entire questline involving Vol’jin’s uprising against Garrosh that was not in MoP Remix. Which makes sense because IIRC it involved you leaving MoP zones. For example, there was a part of the quest where you had to sneak into Darnassus to look for some bell? It’s been so long it’s hard for me to remember. I think this large questline also involved Vol’jin getting stabbed by assassins and the destruction of the Vale.
Almost forgot, I think the entire questline for Halfhill to open your farm was missing too. So yeah I stand by my prediction that the questlines tied to our class halls won’t be in Legion Remix.