I'm ok with vortexes, but it needs to meet some conditions. A vortex doesn't have to have all of these but one or two make it a much riskier/fairer set up to use or to be put in
has an armourable gap (2-3 frames, nothing you can poke out of for free)
punishable Low or OH (maybe both, if so you can scratch the last requirement on this line) that can be made safe (NOT plus) with a bar, that doesn't launch.
fuzzyable (scorpions is a good example), I say this is an absolute requirement as it makes the guess work on the receiving end much easier, and encourages the player enforcing the vortex to stagger their mix ups, which in turn allows for an opportunity to poke out on a hard read.
requires least optimal damage, somewhere around mid to low 20s. this gives you at least 4-5 chances to guess right, even if its on the third or fourth guess you still have enough life to possibly make a comeback.