I have noticed that many of the kits in the game are really not helpful, so i thought that having the ability to upgrade then would be cool, like you could have potions last longer, give higher feather falling, more gapples, more iron, more andesite, longer jump boost, higher efficency/ iron pick, protection/ unbreaking. These would obviously cap out at some level based on the kit and also cost more to upgrade based on the kit. I feel that just saving thousands of points for a ten thousand point upgrade to an ability is not realistic and some people would really benefit from being able to upgrade their favorite kit(s). Thank you!