The 30-minute halves with the clock stopping is much better really, as the amount of time 'football' is actually played is less than that. Substitutions, injuries, goals, fouls, free kicks, corners, throw-ins, goal kicks, VAR Decisions etc already eat up so much time. It would stop time wasting 'strategies' - the only way you'd be able to waste time is by keeping the ball. So, it arguably forces everyone to just get better at football.
I can't agree with yellow card 'sin bins' like Rugby though. There is just too much inconsistency with how yellow cards are awarded. Some players get away with totting up five fouls in a game, some get penalized for their first. We'd have to use VAR for yellow cards and I don't think that would go down well, too much scrutiny.
An Orange Card could make sense for specific types of fouls, like a professional fouls the old 'last man' thing people like to throw around. I could agree with 5 minutes of play-time being the punishment (not not it's own 5 minute timer).
One thing I'll say is that we need to bring these in one at a time and slowly test them.