I will say, I also worry about Hitomi, Zack, Nyotengu, and Bass's 6T when they sorta have to rely on it for uptime pressure for it, but I was thinking that they should probably be the only characters that retain some advantage for breaking their forward throws. Similar to Bayman if you break some of his command throws.
It's just that it can keep characters in check and creates heavy suspense. Just imagine both sides at pixel health, both blocking, going for throw to stop them from blocking, and then they both break it.
For balance, they should keep them unbreakable when someone holds or throws an unsafe move.