You didn't see most people exping on mamool ja and puks at the start of ToAU either. It takes a while for the playerbase to catch up. Doesn't mean it's not gonna happen.

In XI, a player with a dedicated PL can afk their way to cap in a month.
In XIV, a dedicated PL can afk their way to cap in 2 days. It's not just limited to a very specific way of PL'ing either. The low level group still did most of the work in XI. They were not by any means useless or unnecessary. Only the healer was, at worst. The exp was only as fast as the killspeed of the group, not the PL.