To be fair, the mmo part of mmorpg's took a hit with the advent of systems like Dungeon Finder/ Duty Finder. Instead of revitalizing old content with better rewards( weapon skins, titles, mounts, gkamour armor, tomes bonuses, ect...), many games collectively cut out the need for players to go back to those areas of yesterday's adventures.

I can still recall corpse runs in Asheron's Call, having to do that Wyvern fight in FFXI to get DRG/ msq completion. Even partying up in 1.0 FFXIV for a safer way of completing "Living on a prayer" in the final days before ARR.

Point being, while i personally dislike the idea eveeyone using the same npc trust's, what better way to complete old content many won't bother going back for?

Here's to hoping we get to use Retainers/ Squadron npc's to break up the monotony.