My opinion:

Only rule which should be fixed at the moment is to have a QB, a P and a K active on every regular match day.
Reason is to avoid tanking on purpose.
Secondary effect is NO DISCUSSION about punt blocks which might happen like in real NFL but WILL happen if you have a non-punter or a punter with abysmal punting skills.

All the other proposed rules should be put on hold until we have experience if they are needed or not.