So here's my problem with control wards

Once lategame hits and everyone has full build, no one has room for them. I feel that pink wards would be great for late game for the same reason the elixirs are good: they provide something useful and act as a gold sink. I just wish that you had a separate item slot purely for pink wards, as I believe it would help low Leo players get into the habit of using pinks, and be convenient for everyone in the late game. Just give it a slot like what the trinkets have right now.