"Fun" Kassadin Change

I was looking at Kassadin's buffs and I thought to myself "Just how far are they willing to go with the R cool down reduction?"

So I got an idea, a fun idea that isn't really me suggesting a change, but what if Kassadin's R had a cool down of 2/1.25/0.5 seconds, but had it's damage slightly reduced as compensation. So now he can flash extremely quickly 5 or so times before running out of mana and being forced to back off.