I'm pretty sure the reason crafted gear is only as good as the worst token gear is not to combat RMT. It is so gil doesn't have a reason. This means RMT doesn't have a reason. You have less you feel you need to do as you don't need more gil than dungeons / quests drop. Unfortunately it also follows that Crafting will then have no reason to exist. I find this lazy, others find this the right way to go as they follow that with the idea there is no reason to raid if you can just buy. Crafters have their minigame after all, be happy with that right?
In any case so much would have to change to make crafting worth while.
First there would have to be far less max level crafters. Everyone having multiple capped crafting classes make the entire top end of the economy dysfunctional. So we'll need a level cap raise before that could be fixed. Same idea for gathering, there has to be less raw materials coming in.
There would need to be a big barrier to entry. Tedious and expensive leveling at the top is the normal route. They could do something unique here, but I don't know what and don't really expect that would happen.
You can get 100% HQ without all your gear melded now, which is a big issue. NQ is already trivial in most games. NQ has no reason to exist in XIV. We would need a big reduction in HQ rate.
There would need to be (using current available gear as a comparison) a few pieces per job of HQ + Melded gear that would be equivalent to Myth gear. Otherwise even with less supply there would still be no reason to get it, thus no reason to level to cap and make it. This doesn't destroy raiding, it provides an alternative for some slots and acts as part of your gear progression.
Itemization would need to have a big rework. What drops from where would need reworked. Gear checks would need reworked. Even though SE created massive potential with Crafting and Gathering classes, making them worth while and having a viable economy doesn't fit with the playstyle ARR was designed for. I'm confused as to why DOH/DOL are fully fledged classes without purpose, but here we are.
TL;DR: So much potential wasted. We won't have it changed. Meh.