a few measures could have very positive effects. First one is about MB. Lets take the example of any i110 HQ crafted piece of gear to illustrate (lets say Kirimu boots).

- a special NPC vendor will be enabled to sell this item for a high but reasonable price like 2 millions. This is to prevent ridiculously high prices that encourage RMT

- the same NPC will be enabled to buy this item from you for 500 000 gils. This will protect crafters from idiots / fulll-of-RMT-gils people who make the markets collapse by undercutting too much.

Hence you should have the certainty to sell/buy your pair of boots at any price in a range from 500k to 2 mils wich seems decent.