Here's the thing, The telegraphed lunge punch defended by a wrist grab looks pathetic to anyone that has ever been in a real fight. No one cares what principles you think you are developing, the stuff doesnt work when the chips are down.
Here's the other thing, if you are learning your techniques correctly then when someone throws a punch you have moved either inside or outside and put yourself into a position where you control their centerline.
Then even if you miss the "wrist grab" you are in position for any number of techniques.
We were working on this today actually. Control the centerline first when the attack comes and then do whatever technique works rather than trying to force a particular technique.