Very bad ARAM changes

So somewhat recently Riot decided to give summoner spells a 40% cooldown reduction buff (other than Mark/Dash.)

Now, I think that is completely fine, heck for the most part I've enjoyed it, especially since the map is a bit faster paced. However, I feel like a single summoner spell was very overlooked and it should not have benefited from the cooldown buff. That summoner spell would be Exhaust . It is virtually ALWAYS up, every single teamfight --with a 126 second cooldown (further decreased if a player is using the insight mastery)

Now you might say: "well, ALL summoner spells are on a shorter cooldown, so what is wrong with this one being shorter as well?"

A: Its the fact that this one completely shuts down many, many, champions and often gets them outright killed. Pretty much any squishy melee is destroyed by exhaust (particularly assassins like ) and it creates a situation of: "the fact that your opponent took exhaust" you can never succeed at your job as an assassin.

Before, this wasn't as much of a problem, if you got exhausted in one team fight, you would probably lose it, but then you could come back next fight, and do your job well. (due to exhaust being down.)

I would like to know what you thinkof this because I, at least, feel like it is a significant problem at higher levels of play. I say this as a ~2500 ARAM-MMR player (high challenger-level mmr) https://na.whatismymmr.com/God%20Raijin