re: What if you traded 2 yellows = red and adopt hockey rules

Transparency around added time would be ideal for all. It's in players, managers, spectators, and referees interests except when corruption is in play.

I wouldn't be surprised if at some point the Laws are tweaked to have the referee indicate when the clock is stopped, and the stadium/broadcast clock stops accordingly. Official time kept by the 4th. And we end at 45'.

frickery around time is not ancient history, that shite goes down today. Why FIFA isn't proactive about it I have no idea (I do - they're useless).

And stoppages impacting added time are actually fairly well outlined in the Laws - injuries, subs, timewasting, and anything crazy. A big problem is even outside of frickery, we don't have standardization around what constitutes things like timewasting. Thus by knowing what referees regard as same we can get to a more universal standard.