Based off the small teaser of her abilities here's what I think they do.
Rose:
I think this will be one of her damage trips. More than likely, the initial trip will look like that rose we saw and when it goes off, steel thorns will come out and do damage.
Time:
This will probably be a slowing trip, and not do any damage.
Vandal:
It looks like she can generate things with her steel powers or whatever they are. I'm thinking her main ability is to be able to generate whatever guns she wants.
Now this sounds broken af but I think they'll balance it like this: They'll give her a set amount of ability kind of like Viper. But instead of it decaying, if you use your ability, it stays depleted.
Maybe generating a vandal costs like 100 ability and she can't use other util. Or different classes of guns take up a certain amount of ability power. A deagle is like 40, a spectre is like 60, etc. This would affect the rest of her util so she can't just spam guns on every eco round.