I did over 1k fights on the test when it appeared but I think that´s just holy rng.. from what I saw and how much I know about KK ..if I had to guess it´s prolly 0,2-0,5% at best so I think everyone below 300-500 shards is prolly getting a good pull.
As for the animation..it´s a nice addition and tbh not that expensive for well something that´s not really relevant imho.. if you get the girl and still have fights left cool if not it´s not like a big deal imo..I´d have just much more prefered if they fixed their extremely unconsistent art first instead of adding even more to the iceberg..