Kalista - Martial Poise not responsive

So while I realize I'm not the best player by far, I've never played ranked, and I don't have the meta memorized, my ping is under 100, and my fps is flat at 60, I feel like this passive could have a better user interaction. The way it is now, being rooted after starting your auto attack, with a skill shot dash mechanic popping up after the windup animation starts, seems like it would be OK, but there are times I am frantically spamming the movement commands (left or right click doesn't matter), where simply nothing happens. It's also inconsistent with her Q, where the dash doesn't register with a left click, only a right, and still only part of the time. There are times when I can attack-move spam to get reliable, consistent movement, but the targeting is just what ever is closest, champ or minion. You can left click to perform the dash, but as soon as you leave range, you stop all movement.

At low attack speed, you are rooted after every attack, and with low range, you're a sitting duck for a second. At high attack speed, you better be able to spam click faster than the computer sets up the dash cast mechanic or you're not going anywhere. And gods help you if you miss-click onto a new target.

It seems like the entire character was centered around this passive, but it just doesn't seem to be that functional. If that window of clicking was open for the entire time of the attack, not delayed after the attack starts, it would feel smoother.