I don’t know how this says anything other than “Remix is where god mode” and thankfully they keep it limited because that’s only fun for a short time and eventually (rapidly for me) leads to complete burnout.
It’s probably exactly why they’ve made Legion Remix more grindy than MoP Remix and added the heroic world stuff. Because people want more bite out of it.
Those complaining about it being too hard or too slow are likely a minority. People like gameplay in RPGs, they go to flight simulators and BMX games when they want travel.
I just think it’s cheesy to rehash a previous expansion in order to salvage a live season. 
Especially when they set the precedent that it will be part of the formula going forward.