Is the amount of CDR in league healthy or necessary?
back when I started league (season 4) very very few items had CDR on them, probably not many more than 5 items. It was nice, generally no one ever had 40% CDR it was super rare to ever have more than 20.
Now fucking everyone and their uncle has 40% CDR, in fact you usually end the game with over capped CDR.

If I counted correctly 33 items have atleast 10% CDR on them many have 20% and quite a few runes also come along with CDR. Now I'm not saying ability spam isn't fun but is it really healthy?
Back In my day and i'm sure long before my time, people actually had to worry about saving their cds, and mana. I know many of you younger players won't believe this, but yes people actually used to run out of mana if they were not careful in lane, I know shocking. I remember the times of OLD when an Azir would do one spell rotation and be OOM in lane. I remember back in the older days when "I'm OOM" was said 100 times throughout the game. Any ways I'm getting off topic.
Anyone back in the day, CDs mattered you would save abilities for specific times, and would often get punished if you used ur precious ulti too early. Now everyone just wiffs ultis and abilites because cooldowns are honestly not important in these days of abundant CDR.
I personally believe for the good of league we need to go back to the days, where mana conservation mattered and cooldown reduction wasn't a stat slapped on to almost every item.
(because of both the movespeed and CDR). Imagine trying to lane against a Zed that had a spellshield on his second item though. Sure he'd lose out on roam potential, but he'd be incredibly oppressive in lane.
you missed this one. Seriously its such a good item. Building it on fighters brusers or the other plethera of shit offlcasses breaks the item.