For the markets to improve in anyway shape or form they would need to change everything about equipment and its mechanics, but most developers do not wish to upset their player base by removing that uber gear from their characters by either loss in pvp or over time due to wear and tear.

All MMO's with the BOP or BOE mechanic as well as the items immortal status of never wearing out will never drive a real economy no matter what they put in to help it. In the end everyone will be wearing that uber gear and will never need to buy anything else so again the market stagnates. As harsh as it sounds you need loss of player equipment to drive a market.