Stopping the clock when ball goes out, at time of substitution or if a player is injured is actually a good idea. Time wasting has only gotten worse and referees never add in the appropriate extra time.
Rest of them are utter crap and shouldn’t even be considered at all
FIFA statement on rumours of trying new rules: “FIFA can confirm that there is currently no intention to trial any of the changes referred to in these reports, and that these changes have not been discussed either internally within FIFA or with our colleagues at The IFAB.”