But change other things. Why? Sterak's Gage, if you look closely, is Aatrox's missing left hand glove. Its passive also had the same passive Aatrox had which makes it even more canonic. Changing it ruins everything (unless Aatrox's passive changes with his rework, or he has both gloves).
More theories over here https://boards.na.leagueoflegends.com/en/c/story-art/tMNz3mHW-til-aatroxs-right-arm-looks-a-lot-like-steraks-gage