The head of Red Bull said in plain text that Mercedes, losing the competition, is trying to change the rules. And I completely agree with him - there is a technical solution to get rid of dolphining, so this is not a problem of regulations, but a problem of Mercedes. But maybe Mercedes' wishes will be satisfied - no one is interested in Red Bull being the undisputed champion long before the end of the season. How disgusting all this is (although it is reasonable from a business point of view) 
I think that, of course, there is also a political component, when the losing team demands to change the regulations and rules in order to have an advantage in the next stages of the competition. But, I must say that dolphining really affects the health of the riders. By the way, many F1 teams are working hard to change the aerodynamics of the bottom of the car. They come up with ribs and holes and something else.
But the problem is still worth solving both technically and, possibly, adjusting the rules.
If your car dolphining and the health of the pilots is deteriorating, then you must increase the gap between the bottom of the car and the road. Eeeeeezy solution isnt it? But you shouldn't force all teams to increase the gap. I haven't heard Red Bull complain about dolphining. It would be great if the federation fined Mercedes for causing harm to the health of the pilots and forced them to increase the clearance, but would not touch other teams
It would be logical and fair. 
