The point of addons is to extend UI functionality using existing instruments, not to change gameplay and grant advantages that would change ingame balance. A good example of this are buffs information. After game release, ZOS disabled in API the possibility of display what buff are on target and on player itself. Because, with
FTC, players had advantage over those without it.
Take it in this way: 10 people are working on something and you have 2 great ideas how to improve that something. 1000 working people and you will have 200 ideas.
You can drink 12 potion one after all, but only last will have effect. No change in gameplay.
Putting aside the moral arguments this, is not possible what you're asking for. If it would possible, someone would do such addon just for sake of PoC.
If you want moral arguments, do an effort and search in google. official forum and reddit is full of debates regarding skill bar size.