Ruby Sightstone Ward Recharging

Something I was thinking about is how often I've seen supports buy the Sightstone + Support Item variants over Ruby Sightstone. I double checked what all the variants gave over Ruby and it was simple, stats. Looking at the variants, every single one of them give CDR, regen, and Watchers gives AP. Equinox is the only one of them that matches Ruby in HP value, but that is all Ruby has going for it is HP and CDR on active items (not abilities).

So while those are the more combat-ish focused items, why not give Ruby something extra to help players want to use it more often? The solution I came up with, restocking its wards without backing. The vision game is important in League, so why not make Ruby work more around that aspect? Lets say something like "Every 5 minutes generate 1 ward stack", another could be "Upon destroying an enemy ward, recharge 1 ward stack."

Something along those lines would help Ruby Sightstone work more like a Sightstone instead of being replaced, giving it a unique identity from the other options as the superior vision game support item. It would still restock its wards when backing, but every support player knows that it sucks when you run out of wards to place off of your Sightstone items, forcing you back to base to get more.