I feel Venomous is a bit too unsafe tbh. Her only safe strings on block do <3% chip. The f2,2,4 is unsafe(and f2,2 even moreso), and she has no mixups(b1 is super unsafe).
Also, I feel the vortex is not really that great, if you go low and get blocked, you get a full punish; unless you poke low then combo high, then yeah sure I guess(note that d4 is not safe vs Lao's Cyclone).
And finally, her best meterless punish is 27% + .3% tics to my knowledge, although you don't really need her meter for much else so that's fair enough.
Oh and as said above, Spray/Burst are both unsafe and you can't cancel much into them.
Despite all those flaws, her footsies game is great, she has good reach on njP and I really enjoy playing her.