My only gripe with UA is that I wish if it was stacked that it would show how many stacks of UA is on the target. Currently theres no quick way to tell if youre dispelling a fresh UA of 1 stack, or a UA thats been stacked multiple times to crazy damage.
Other than that, I have no problems with how UA works now. In past it was either too strong that you couldn't ever dispel it or you were basically screwing yourself, or it was so weak that dispelling it was a no brainer. At least now I feel like theyve found that balance where if a lock has really done well applying his dots and building up UA on a target, you either dont dispel it and take the punishment for letting the lock free cast or you try to dispel it and risk instakilling yourself.