Idea for Sightstone/Oracle Lens
I support often, and every game I rush 
. A wonderful item with only one (albeit big) drawback: it has 4 charges, but you always want 3/3 of your wards placed. These charges do not refresh unless you recall, so after one or maybe two warding journeys, you're out of wards. There are times I'm tempted to just grab 
because at least it has refreshing charges, but of course support should usually buy 
/
to deny vision to enemies. The sweeper keeps a tally of all wards removed, which is nice, but what if removing an enemy ward using sweeper added one charge to your Sightstone?
TL;DR Sightstone charge system is kind of meh, why not have sweeper give you one charge to the stone for each enemy ward you remove?
instead of 
another charge whenever one of your wards decays. That way they still regenerate, but you can't use them forever while in combat due to placing wards when you already have 3/3 placed. It would also provide a better reason to upgrade sightstone.