They also went to FF14, New World so now they are expecting more or have just switched games. Classic+ will have to be as brainless as Classic to make room for "bad" players (LFR) that can only play Classic and on the contrary hand would have WOW TBC Gold to offer modern games to everyone else... It's a challenge to accomplish, if not impossible. It's likely that the Classic+ community would come together in a single unit since it's so dispersed.
You're looking to go with the classics but you don't want it to be a classic. It seems that you want to try something new. Every private server that buy WOW Classic TBC Gold played Classic + gave up after several weeks. The only reason to play this game that is 15 years old is because of the community.