I would honestly like to see cooldown reduction completely gutted
I'm a mage player too, but honestly it is so fucking easy to get 40% cdr. Transcendence, a 20% cdr item, and then lich bane or zhonya's and boom. Quite literally every single class of champion has access to obscene amounts of cdr, even fucking adc's (30% cdr on one item xd). You cannot tell me that damage creep and the ubiquity of waveclear is not directly linked to this. At this point in the game, mages can have 3 second waveclear abilities at ~10 minutes.