Yea, zos usually can't balance stuff. Don't know why they can't make minor tweaks over and over to tune items or abilities. They make some major change and it becomes useless. The amount of sets that went from arguably a little too strong in certain situations to never used again should be surprising, but after watching them fail time after time, it's not.
I never used or intended to use this set, but this kind of change is what I am strictly against. Change existing numbers, not what set does!
There are so many variables to work with: cooldown, proc duration, mitigation percent, snare potency. And they choose to change type of buff set gives from unique to named buffs that are not hard to source on your own. This is not just number nerf, this is change in functionality, this should not be happening in games where acquiring proper setup is as time consuming as it is in ESO.