I personally feel the system is bad and it spreaded through most MMO's and this is not an FF14 issue specificly. Everything is for nothing every major patch. I don't mind redoing it on every expansion but every major update seems a bit much. Why not make it so that the gear will be upgradeable throughout the expansion. Meaning progressing your gear througout the expansion. Here is an idea. Not perfect but there are a lot of clever minds who can work this out further.

6.0 - introduce craftable gear to start doing end-game content
6.1 - introduce first raid tier gear
6.2 - introduce weapon enhancements (sort of like relic questline)
6.3 - introduce gear enhancements (maybe a relic version of this as well)
6.4 - Improve accessories
6.5 - Augment gear or further upgrade
Would also like to see that on this stage you can get a Disciple of War or Magic version. So you don't have to grind glamours for alts.