Balancing around CDR is a mistake, because it will end up like Flash.
With
eating the (well-deserved) E cooldown nerf because of CDR, what the balance team is saying is that he is expected to build CDR. And it's true. Its heavy abundance in every type of build since the MYMU and preseason means he's likely going to build it.
But that means that the game is now starting to get balanced around CDR, and that's the same poor design choice made with Flash. If a champion is expected to build CDR because he's running into it everywhere, and takes a cooldown nerf because of that expectation, then he's basically forced into building that CDR to make up for that loss.
CDR is currently a side stat that you randomly find on a lot of items, rather than being a stat that you deliberately build for. This is a problem.
The end result is that items without CDR become less and less viable. Items like IE and Deathcap become less and less common, because champions have to first build Cleaver and Morello. **CDR shouldn't be a side stat on so many items. ** Pretty much every build path under the sun has CDR in it.
Assassin:
Fighter:
ADC:
Tank:
Mage:
Support:
All: 
If you're running into CDR in every build, and they start nerfing cooldowns because of that, then building it on almost everyone will be necessary to function. And we'll end up like Flash.
IMO, CDR should be a limited and deliberate stat to build. You shouldn't be running into CDR everywhere, you should be running into CDR when you specifically buy a big CDR item.
with
and remove at least 10% cdr in exchange for making triforce cheaper.
broke
Broke
: She can dash 3 times and she gets one jump on kill or assist
: Low cd on his q and e, not to mention that he's always build cdr
: She has 7 spells (but she's difficult to play so that's ok)
: W resets on kill or assist and her q has almost no cd
: Her q is like 2 sec cd if she hits something
: Q short cd, ult almost no cd
: All her spells reset on kill or assist
: E resets on kill or assist, q short cd
: Her w makes her q on like 2 sec cd
: Her ult allows her to use a stronger version of the previous spell and it's still going on cd while she uses the ult version
: 4 sec cd on his q if maxed
: His basic spells reset on kill or assist
: Pounce is like 4 sec cd with her passif
: 2 sec cd on spear
: 4 sec cd on q
: q is like 2 sec cd if she hit someone after the dash
: q reset on kill or assist
: lol cd on this guy?
: He doesn't even need cdr, as gives him less cd on q