Absolutely NOT. Sure, it might be good for the attacker--but what about the attacked? If you're good, when someone's doing a full unload on you, you can typically catch it partway through and start hitting 'em back. You don't get much, but you deter them slightly and depending on stats might win. With a button like in ebs they have no chance. So no. It's totally unfair.
THIS FAILS, Can you imagine being hit and pinned in 5 seconds and not being able to do anything about. Because by the time your phone receives the message. Some is attic your kingdom, go and defend it. There is nothing to defend. Yo ass is pinned
No support. It sounds nice but makes the game too easy for an attacker. it takes a lot of the risk of attacking out of the game when you can hit yourself to pin before your target knows what has happened. Before you know it people will be demanding the devs to allow botting so they can grow quicker or stay in pin when not playing