I think you can only rock someone with elbows in the clinch you should 100 percent be able to ko them though as long as you have done enough damage to your opponent.They really should make the ko camera angles a little better looking though because from what ive seen the angels look good but a little bit too close.
Also somebody suggested before that we should get like the last say 5 to 10 seconds of the fight for a replay instead of the clip of just the last strike landed that would be really cool especially if you finished with a nice barrage of punches or like a punch kid combo like what Cerrone did.