It would be awesome if we could level our armors along with our level, i'm sure more than half of population would be happy about this.
It would devalue upgrade mats a bit but might encourage alternative gear/build setups, help newcomers etc.
Perhaps some cool generic quest line for gear level upgrade tokens.Maybe along with this implement magical TRAIT/STYLE changes( combine 10x trait/style stones along with upgrade tokens(this would give those stones some value at last))keeping existing set bonuses.Add new extremely rare unique styles(as rewards for loyalty maybe? or difficult achievements, achievement score shop etc) and players will praise this.
It is sad when each time level cap gets raised and you need to look for new pieces of beloved legendary set.
New content always brings in new more powerfull sets anyways.
discuss, please also some feedback from ZOS would be nice