I really hope it's not just a vertical gear progression. I'm so sick of those games. "Oh sweet, I got this awesome armor set for doing endgame content! ...oh wait, it's now completely useless since they put out the next batch of endgame stuff. Yippee." I like gear that I can wear for a while and just upgrade the gear itself. I think it would be awesome if all the endgame gear would just be upgradeable, and the upgrades would also slightly alter the appearance of the gear (in a way that you could choose). For instance, you complete a questline with a party battle at the end, and it rewards you with a gear upgrade. You can choose one of a handful of "new looks" to add to your gear, or just take the stat boost and keep your gear looking the same. It just seems much more customizable and fun than trashing your old gear every time something new comes out.