Why remove Clairvoyance? It could have been cool. CV's removal is an unhealthy attitude by Riot.

I always had this idea of {{summoner:2}} leaving behind a Pillar of Light that would provide some sort of buff to Allies when Moving toward it/inside its Aura (Offensive/Utility/Defensive) and providing True Sight of Enemy Champions spotted by it. You know, something that would make you want to pick it over or depending on the situation.

Clairvoyance was gimmicky to begin with and obsolete when Riot released Scrying Orb.

Riot needed to change its niche - not remove it. This sets a bad precedent for and . All defensive, non-mobility Summoner Spells (save for Heal). I'd say about 95% of the time Heal is taken without question, with Barrier and Cleanse both being taken incredibly situationally. In reality, they probably need to be reworked to be the same but different. Interchangeable, but taking one over being conscious decision making.