The downside to j.2c not being jump cancelable is if the opponent is expecting it, they can use an invincible move (DP, invincible command grab, etc) to punish it on (instant?) block.
Only way to avoid that would be to RC it.
Despite that, I'm just glad it's usable in normal situations again.
edit: oh yeah, for DPs you could cancel to chair, but that won't work vs command grabs...