Since you can "declare" a trigger anytime you have the suit it would give her a more restricted butterfly jump... Would have to be careful about what the trigger actually does beyond that buuuut.... I would love it, she'd be even more slippery...
She could declare it against friendlies doing things like magnetism, pneumatic toss, lure, dispel magic or wrench heal (depending if trigger happens with DF/MV/WP etc.) It also doesn't matter much if her steam is up for these. She can push regardless if the attacking friendly hit their TN on a neg or not. A friendly can try and magnetism her in concealing, she relents, decreases her dual total by 2 to add suit before declaring DF trigger. Push, profit. Would be awesome... I get why they haven't cracked that can of worms tho....