I've tried j.B to catch rolls myself, with mixed success. It's great when it works; pick it up just like you would with OTG j.B > 5C. But as Isorropia said, it can't cover every possible tech option and you lose your oki if you guess wrong. It's probably better to use it on characters/players who you KNOW will try to roll out of the corner, like Lambdas.
I once saw a XBL Hazama use a Houtenjin OS for people who rolled out of the corner. If his opponent rolled, they ate a Houtenjin. If not, he whiffed a 5B. I've never tried working this into a real game, but I think a similar OS can work for Tager.