Reworking Cleanse

I was wondering if anybody else agrees on maybe making cleanse a summoner that you can only be used when you are being affected be a slow or a stun. For an example the way it is set up right now a summoner could use Cleanse even if they are not being movement impaired. I am suggesting that you should only be able to use it if you are stunned, snared, sowed, etc... So I am wondering if anyone else thinks the same thing because I feel that Cleanse would be a more useful summoner if it worked that way.