User blog comment:Elphrihaim/Clarivoyance...?/@comment-3466579-20130806144210

Clairvoyance IS a good summoner spell. The problem is that it simply is useless if your team mates don't know how to put it to its best use.

Take Exhaust for example. You use it, you get its effects. If you use Clairvoyance to, say, prevent a gank for your toplane and your team mate do not look at the map, you've wasted your summoner spell, even if you used it in a very good way.

This is why Exhaust replaced Clairvoyance on supports. They are both good spells but one is generally easier to be used at maximum efficiency.

This said, i'd think that the best way to buff Clairvoyance is to add a visual and / or an audio indicator of its use. I mean, when someone uses it you hear something like a ping and a small indicator shows on your screen and map with an arrow pointing to the revealed zone. Something that tells you "hey, someone used Clairvoyance, take a look at the map, it could save your life / give you the chance for a good play".