Why are we bringing Warlord's Bloodlust back? (7.24)

I know people are focused on Sona changes and the "lack of Zoe nerfs," but I noticed something else in 7.24 which should arguably be talked about more:

Fleet Footwork (P1)

[New Effect] "Healing is increased by 40% of your critical damage modifier when triggered by a critical hit." Heal changed from [5-50] to [3-60] AD increased from .1 to .3 AP increased from .2 to .4

Now, this doesn't work EXACTLY like Warlord's Bloodlust:

Moving or attacking makes an attack Kircheis Shard item Energized. Energized attacks heals for 5% - 40% (based on level) AD and grants 30% movement speed for 0.75 seconds. If the Energized attack critically strikes, it instead heals for 5% - 40% (based on level) AD × (2 + bonus critical strike damage).

But.... let's work through both of them. Suppose an adc has 100% Crit, and 350 AD with a 225% Crit damage modifier.

Fleet footwork heal: 255 (and it gives a 1 sec move speed boost)

Warlord's Bloodlust: 315.

They're basically going to be the same Mastery/Rune, except Fleet Footwork also acts as an insane gap closer, and Fleet Footwork can work on AP builds too (although there aren't too many AP champs who actually find enough in Precision to take the tree.

My concern is this: I thought we were getting away from the free sustain meta? Warlord's Bloodlust is why adc's were such a subject of contention in Season 7; An adc could build full crit + lethality, and completely ignore building sustain. It's why adcs could go 20/1/18 without a single life steal item. It's why Jinx was unstoppable if she got an early 2/0 score.

And you're bringing it back in an environment with MUCH MORE POTENT HEALING.

An adc can literally go: Fleet Footwork + Legend: Bloodlines + Ravenous Hunger + Taste of Blood and have 23% Life steal + a 255 energized heal to top it off.

On our 350 AD adc (which is conservative today with 400+ AD), we would heal 105 + 255 + 181 = At LEAST 541 Energized heals on an Adc (more because this doesn't take into account any damage bonuses any specific adc has, like Jhin's AD scaling from Crit/Attack speed, Cait's Headshot, Vayne's Ult, Janna's E, etc.)

That doesn't include the heals Ravenous hunger does in between Energized attacks or the 8% from Bloodlines. It also doesn't include Triumph, which will heal 12% every time you kill someone in between.

In other words, soon Adcs are going to self heal for more than most Namis heal for, and faster, more reliable than they ever have before.

And I don't really see a use for Fleet Footwork for most mages. Given how quick Energized attacks work when auto attacking vs when just using the movement part of it, there's VERY few mages I see actually using this mechanism. Maybe Kayle? Teemo? Azir? This change seems specifically aimed at auto attacking AD's and champs we already consider broken when played right.

I thought Ravenous Hunger was Riot's substitute for Warlord's to allow mages to equally benefit. I was wrong. They want it back on adc's PLUS Ravenous Hunger.

Get ready for Jinxes and Vaynes and Tristanas who cannot die.