Solution To Mandatory Flash

Now, I hear a lot about how flash is a mandatory Summoner Spell, and it pretty much is true. Additionally, removing flash would cause huge problems for flash-dependent champions. I've got a sideways that might help with the overall "Flash is mandatory" problem, without gimping or removing flash itself.

>Reduce all Summoner Spell Cooldowns by 20% Ex: Exhaust: 210 --> 168 >Flash now increases the cool down of your other summoner spell by 25% Ex: Exhaust: 168 --> 210

The summoners are exactly the same for anybody that still uses flash. Other summoners aren't more powerful to outweigh flash, just usable more often. The point of such a change is that the choice to not take flash would empower both of your summoners, so even if Flash > every other summoner, it might not > the other summoner plus the extra uses of your second summoner pick.