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.
Geez, mummy, can i grab the wrist? Huh? can I? can I? Please mummy, please? I wanna GRAB THE WRIST (TM)!