This is exactly why I want add-ons: mostly to tweak how things are presented client-side. Indeed, to sort an inventory, we don't need to use server resources, we just need to "show them sorted" with filters and whatnot on the client-side, regardless of the actual order of items server-side. Likewise you could show all your inventory tabs at once...

I understand it's hard for a studio to cater to everything that players want, and this is where add-ons come into play: to each player her own preferences.