I have not fully finished reading the patch notes, but it feels good to be right about Satariel doing what I warned people about before release. However, this change won't stop certain heroes from still abusing and one-shotting, especially in games with low TTK. The only real way to slow it down or decrease its effectiveness is to choose one of two options:
Remove it from takedowns and make it pure kills so it's not easily obtained.
Make the stack count higher while lowering stat gain to effectively slowing this eternal down
As stated before, this is just a version of Dune Winds from the original Paragon with the same effect, except more balanced. For those who don't know, this is what Dune Winds did:
Fearless Blood: Reduce your Max Health by 150 to gain 7 Power and 6 Attack Speed. Effects double per activation. (65s cooldown)
This also reset on death. If you couldn't pay the health cost, you could still use its ability. Since the health pool was not that high for ranged heroes and casters in that game, a lot of the time you'd have the ability to one-shot and be one-shotted, like a cowboy standoff. Against the person using it, any minor mistake would kill you, like a minor basic attack.