Kat's lvl 1 is extremely unsafe. So unsafe that even if she catches someone in it, you can even steal her kill if you react quickly enough. Her Sliding lvl one leaves her unsafe at the end of the slide, even if she combos into it. So for anyone who has projectile or projectile-like supers, they can capitalize on Kat's super.
Some good examples:
Radec's level 1 or 2
Spikes lvl 2
Sly's lvl 1
Toro's lvl 1
Ratchets lvl 1
If Kay dies after trapping the victim they still explode after her death.
well, i tested it out in practice mode and you can catch them both, if you are too late, kat gets 1 kill, but you can still kill kat