User blog comment:KeithCornell/My changes to Regenerations and other stats/@comment-973379-20150405150822/@comment-973379-20150407074013

But.. this will make armor basicaly useless(for tanks - and for everyone else for this matter) - why build armor at all if main source of phis damage(ADC) ignore it almost completely,  2/3 of the time at least. Assasins? Tanks even without much armor almost ignore their bursts. Towers? Better build how-that-item-to-shut-down-towers-was-called.

Also.. "normal" late game AD of average ADC 110(base)+200(IE+BT+LW)+40(runes/masteries)= 360-400. AS - 1.6-1.9. So it 700 or so DPS. Count "some" armor left(and even 30 armor give 25% reduction) and we have 530-560 DPS. In full build. Cassio have more. Karthus have more. AP/AS Kayle have more(and have heal, real utility and burst). Damn, MUNDO have more against most champs thx to his Q.(and 200 AOE dps if he build full tank+lyandry). Oh, and "currently overpovered" adc don't even scale that well with "current" crit, but will be a lot better or the same with "your" proposed one. Kallista, Vayne, Kog.. those late game terrors - Kallista just AA-jump-repeat 10 times-E(and build AD-AS in form of BT+hurricane+BotRK+LW), Kog and Vayne can already abuse triforce, and with "crit to arpen" changes triforce will be even better cause currently damage from triforce(and Vayne Q) can't crit - but I see no reason for it to not be affected with "crit penetration". Meanwhile Ashe(and Cait, and others damage-from-AA-based ADC) will cry in the corner.. and she's already weak. In other words - with this rework you will need to also change/rework all ADC and the way armor work.

P.S.

>Proposed changes edit 1 in response to User:TwiceBorned: Life Steal restores % base health on-hit. It still allows tanks to restore more health than marksmen in one hit, but the latter will make more use of it in sustained combat because of their superior attack speed.

Better nerf Irrelia.. And WW.(and may be some other champs like Udir, Shyvana...) You know, both have 2+ AS and high base HP and "build in" heal. And no AD, so "classic" life steal isn't all that good on them.. and they still have good sustain.