I'm still staunchly convinced that turning Purify from reactive to preemptive would actually lower skill expression, because it's not exactly hard to just press the button just before a burst, go in and do your thing unimpeded, then go out once it's over. Can't exactly say the same about a reactive button, you're at the mercy of whatever the enemy is about to do, where and when and you don't control it, however you can try and predict it, and position more carefully, which induces a lot more skill expression.

Fetter Ward on the other hand is just a godmode button that has very little counters but a gigantic burst to repel the person using it. I can already predict 110% that at crystal level, you'll never get any punishing kill anymore against harassers. Even in diam and lower actually. As a side effect, this would also outright demolish ranged dps jobs.

The only thing I don't like with current Purify is the time it takes to cleanse/use it which already accounts for half the duration of most CCs.