I try not to use j.2C as a gimmick until near the very end of the match when you do have meter and your opponent had to burst to avoid losing. It ground bounces on counter hit, so any combo she hits will lead to very big damage, and that sets up points to bait bursts. If it is blocked, the ambiguity of the move allows you to relatively safe options off after canceling into a Stein. I really like air Steins to air dashes, and you can mix them up by either going into or out of the direction you place it. I'd just say to watch out for specific dp's that hit more above than across.
Also, if you do attempt j.2C really low the Steins may not come out or you'll have a harder time canceling into them.
EDIT: Can't cancel into Steins after block j.2C. Even so, I think that if it decides the match, it would be worth it to go for the ambiguity factor. If it doesn't work, you can always RC into several options, like Steins sets, dp, or even gold bursting if you feel gutsy.