Is a new late game control ward feature needed???

So I have bee watching alot of Pro Play, and I have noticed, that when they get to late game with 6 items, they have to sell an item to make place for a control ward, and then go back to rebuy the item they just sold. That made me think, why not make a feature, so when your item slots are filled, you can stack a control ward on top of your warding totem or sweeper?? I think that would bee a nice feature, and it will make it alot easier, to get down the needed control wards in the late game.

Just a thought :D

Regards BattleWolle