the 2nd was just some strange thinking.
One more question. could you have 2 sub keepers on the bench? Say Ospina as usual (non Champions league game obviously)
and let's say Welbeck. Just in case Cech get's injured early on.
I am sure if someone tried it they'd put a stop to it.
I would say Arsenal led to some rules being clarified during the invincible area. Well particularly Henry. Where he used to nick the ball off the keeper mid motion. only for the rules to be clarified (they may have already been like this)
2nd the quick freekicks lead to that wait for the whistle thing.