Do the cards need to be balanced against each-other though? I think an RNG based mechanic is fine having mediocre, decent and amazing outcomes. The job gives you tools to try and mitigate what the RNG gives you, having a goal when you use them isn't a bad thing.

That said, they seem to have something in mind with the whole reduction in synergy thing, which I suspect heavily influenced the AST redesign. (which is a weird thing to do when introducing dancer, but whatever)