Regarding the stage management, yes that can happen in the 1 team giving team orders between the drivers, but I can't see that happening in a live race between 2 teams. The drivers are too selfish to follow such orders.
Its difficult to tell, when you have one team/driver dominant for too many years it starts to affect viewing figures and revenue.
Like WWE, at the end of the day they are doing this for money through various means, collective strategy is going to increase income.
I think it interesting that Porsche have stayed well clear of F1, I suspect that they believe that if they are in F1 and don't come first then that can only damage their reputation eg a Mercedes consistently beating a Porsche has got to be damaging to Porsche's image.
From a physics point of view ......
One thing I have always been suspicious of is driving over small kerb bumpers (or to a lesser degree smooth raised kerbs), if you are running at the limits of grip, something like a kerb bumper has got to reduce your overall grip considerably. My conclusion is that they aren't driving anywhere near the limits of grip otherwise they would be forced to stay on the tarmac. Is it showmanship rather than speed?
If they aren't running near the limits of grip, how are their lap times so consistent? Other sports with similar grip changes eg downhill skiing have much less consistency, you hit any rough and you've lost a lot of time.