I would really dig the gear-manager from Retail in SoD

It’s shockingly easy to overlook a single item or two when manually changing your gear after swapping spec, and if you’re also juggling multiple gear sets per build (like having a set just for Naxx and whatnot), being able to save your own “sets” would be fantastic.

agree but there are addons for this just as a heads up

there are a few features … like confirming you wish to be locked to an in-progress instance, autolooting gold and badges, the retail AH, the retail gear manager, merc mode … that solve certain problems permanently. There is little reason not to implement them in every iteration of the game.

i wish they add it in Classic and TBC, atleast the gear manager we had during Wotlk, i don’t know retail

but i recently learned a tip by myself

method without add-on → you can create a macro →

/equip this
/equip that
/equip this
/equip that

for all your gear sets