TLDR at bottom
I think blizzard must but smoking some strong stuff if they think old raiders are going to be enticed into coming back to WoW in the next expansion when the flaws of the current system are in place.
Until they reintroduce true raid progression then I don't know any of my old WoW friends that will bother coming back to this game whether they enjoyed the lore or not. And just to note that everyone I've ever made good friends with in game or outside has now quit. And that's been a hell of a lot of people since I started playing around 8 years ago.
Blizzard can't seem to get their chops around the fact that a lot of the people who used to enjoy this game now don't enjoy it because they are FORCED to breeze through every raid on complete and utter EZ semi/afk mode before they get a chance to challenge themselves. This and the fact that the experience of defeating bosses so easily in game is completely underwhelming and undermines any wonder the raid has to offer.
I'm fine with the fact that there are people who pay just as much money as me but don't have as much spare time as me that should be able to experience to content. But why is EVERYONE else forced to play at this bottom tier ultra casual level before they get to the real challenge? It completely destroys the merit and satisfaction of killing bosses.
TLDR The current equivalent of this system is if you bought a new game and was forced to play it on super easy mode before you actually get to play it the way it was meant to be played. You don't see this in any other game because it would completely kill sales.