Have you ever considered having a character that can "cancel" chases? Something like...

"Chase the Knocked Down ally and give them a shield"
"Chase the Repulsed ally and negate all damage from the previous Chase attack"

That way, instead of your opponent continuing the combo, you interrupt them and stop the combo. Of course, these "cancelling" chases wouldn't do any damage.

Any thoughts? Would this be useful at all? Would it be overpowered? I honestly have no idea...