I think it is you who don’t understand the concept ‘mmo’

More now than ever. You can LFR (auto matchmaking) into most raid content just a few weeks after the “normal” versions come out. The loot is a bit less powerful, but if you’re not looking to push Mythic difficulties with a guild anyway, it won’t matter. There’s a group finder tool to aid in finding people for content…

It’s inevitable simply because if we end up at level 150 the idea of levelling from 1-150 is going to be madness to a new player, it’ll either have to be massively sped up (in which case most quests become irrelevant) or be repurposed. It’s already pretty depressing.