Can we get it so Sightsone generates one charge every 100-120 seconds?
I feel this would help out a lot with issues like when you are already at full build and spent all of its charges and haven't returned to spawn in five minutes or more. It would make it so that you can stay out in the field with your team for longer periods of time without having to worry about returning to base and leaving your team without a support should a team fight arise while you're back in base restocking Sightstone charges.
It would also help to make Sightstone a more desirable item for supports that normally don't build it due to its limitations despite it's usefulness.
This. When warding totem came out I was like, why does anyone need a sightstone if totem has refills?! Then I realize the totem wards don't last as long even at the end.
However to balance out the bot lane perma-ward problem, I suggest putting the refill feature on tier-2 Sightstones only, and make refill time scale, for example 180 to 120 seconds.
Can also put it on ruby sightstone only, to make it a more popular buy, especially late game.
Felt I needed to keep this comment up where it can be seen.

- wards and hp : 800
- adds more hp and grants item actives 20% cooldown reduction : 1600
- adds more hp, hp regen, income per second, spoils of war, cooldown reduction : 2300
- adds a small amount of hp, hp regen, mana regen, cooldown reduction, and favor : 1900
- adds a small amount of hp, mana regen, ap, income, cooldown reduction, and tribute : 2200

support, which a side of
.
My general build for them is
, and then relevant boots and whatever item I feel building last, be it AP, defense, or
.
In this scenario, the recharge would be more beneficial to
etc. The AP supports, however, would need to recall more often by design, because unless they're building mana regen items (which generally they are not), they need to replenish their mana. In that case, NOT having a recharge on