That's called stupidity. You really seem to be quite full of yourself.
Hey wanna here a joke?
How many teenagers does it take to change a lightbulb? One, he holds the light bulb and expects the world to revolve around him.
Haha.
Anyways enough with the insults.
To address your actual idea I can spot a bunch of problems immediately. First off you would straight up destroy any tank with mobility. Hey malph you like that ulti? HA its now a 10 min cd, yo sej you like that dash? Bam now its 2 min. Hey zac you like that slingshot engage and ulti? NOPE, its at least a 4 min cd for both. Shen, hecarim, nautilus (his q is mobility), maokai, poppy, irelia and the list goes on. All immediately unviable.
Also a lever is something specific they can use, like a key item that eveyone in the class builds. For adc this would be Ie or any of the interchangeable zeal upgrades (you can buff/nerf all of them at the same time due to build path), mid lane has a bunch of new items coming, for jungle its the smite items etc.
It would be a massive effort to even sort it out and would solve nothing, the real problem with tanks right now is the combination of sunfire for aoe consistant dmg, iceborn for slow and proc damage and grasp giving champs like ekko sustain when then shouldn't have any sustain. Best way to fix off he top of my head (don't take this too seriously) would be to find a new way to scale sunfire or grasp (maybe healing based on enemies hp? idk just throwing out ideas). Honestly sunfire has been a problem its entire life as an item. Either its top tier due to the aoe damage plus armor and hp or its shit because something else is better (like how dead mans ruled back when it gave 600 hp, 60 armor and like twice as much movespeed).
Anyways thats just my two cents.