It would be dead on arrival.

Most players dont need to earn exp, so we're just what, killing these things for Conquest points? Great, like we needed another grind currency.

And what do I get with Conquest Points, a reduced teleport fee by 10%? I dont even think about teleporting fees, most players now have millions of gil, so that is kind of pointless.

Also what purpose is there for these specific vendors? They wouldn't have any gear anyone would want at endgame, so they just sell minions and glam glear? This is just like the hunt billmaster 90% of the time (as SE only ties gearing to hunts at the outset of each patch and release of new currency, then it just devolves into a thing only a few ppl do for minions and glamour).

Lastly it seems this would be open world, so Grand Companies would be competing against each other again. This is already not popular in PVP, so thats another no.