My beef is that it isn't very well defined for the variety of situations it is called in. With the current way it is called, it seems like if you are in scoring situation, the defensive wrestler is allowed to use reaction time an indefinite amount of times. Best example is big ten rocco vs max. Max had him in a TD position once but rocco reacts, lifts his hands off the mat. Ok that's reaction time so no TD. Then max returns him to the mat, lands him with time left on the clock, but...reaction time. Max had maintained control for at least two seconds but isn't awarded the TD.
In short, I would be ok with the rule if reaction time was permitted only during the initial action / flurry. After that, it seems to me that if the offensive wrestler maintains control over the defensive wrestler's counters, it should be a TD.
Another way to think about it, if wrestler A gains position behind wrestler B from neutral and mat returns him, but wrestler B touches his hands to the mat and springs back up to his feet immediately, how many times should that be allowed to occur before a TD is called?