Weird/random idea for AST to make one ability actually...have a point:

[MintnHoney]

And lastly, there's still some truly negative effects (potentially). Gyoten/Yaten, Hell's Egress/the other one, Elusive Jump, Repelling Shot, En Avant, Thunderclap, Corps and Displacement would all be on the table as 'oops you got a bad roll, time to randomly flip off the edge/into the deathwall'. Nothing says 'chaotic fate' quite like suddenly being repositioned, unexpected Rescues in DF content show that pretty clearly

Well, so that's where I would personally try to draw the line: any effect that would cause any player to be forced to move isn't just a truly negative effect, it actively stops playtime and potentially ruins the encounter (although I wouldn't avoid this so much in most other games, but in XIV, the extremely choreographed fights mean that unexpected forced movement is absolutely the worst thing you can do to someone). I think it would be better to avoid creating a scenario where the risks begin to severely outweigh all of the potential positive effects, because then Undraw would remain excluded from serious gameplay instead of at least considered for mixing up the now near-non-existent rotation.
Assuming the intent is to make Undraw a contender, but still give it random effects, I think applying status effects onto the party is about where we should cut that off, and even then, to avoid having players whine about ASTs being unplayable due to 1 skill being unpredictably good or bad, being able to Esuna all the negative effects off of players should be the answer to those situations where things go sour (and it'll give us a reason to have the ability on our bar at all times again, and we'll still feel the impact due to needing to spend GCDs removing the effects). If the issue then becomes "but the enrage timer!" because the healer(s) had to spend up to 8 GCDs on removing the effects, then that's probably more a skill issue and potentially a tuning issue for the encounter, and the alternative is to simply use the card rather than undraw if they must have reliability above all.