User blog comment:Willbachbakal/(Item Concept) Another Look at Vision/@comment-24946635-20140722040224/@comment-1330314-20140722091505

Actually, stealth is one of Riot's biggest concerns right now regarding counterplay: the problem with stealth, among other things, is that it's extremely binary, i.e. it relies upon a system of hard counters (true sight) to keep it in check, but is otherwise immune to reactive play. No singular mechanic should "force" you to purchase one specific item, and true counterplay arises from moment-to-moment reaction, not from buying an item that negates an entire mechanic altogether.

I'm glad you're in favor of the changes to trinkets and Sightstone, though. One of the issues I take with supports is that, despite their utility scalings, they're still not allowed to scale in the same way as other champions, and consequently feel unsatisfying at times (I main support and jungle, so perhaps not all the time). Moving a mandatory item to a mandatory item slot, rather than having it block the space for a more choice-based item, would hopefully give supports more build freedom.