I aggree with number 1, id make it that each car can only make it that only 8 guys can service the car, one per wheel, the jack men and two others for help where needed. As for the Lollypop man, get rid of him and let the race engineer do that from the pit wall. Or have the pit crew, but the front jack man be in the garrage before the car stops, then work begins at a pace.
As for refueling, the thing is that the rigs that were used untill last year were bulky and very costly to ship. My solution would be a simple, clear plastic container that is suspended above the garrage and comes down via total gravity fed lines. For saftey reasons id have fuel stops as stand alone fuel stops that has to last a minimum of 10 seconds. But id also do this with a standardised fuel tank of 80KG as well.
As for the handycapping, id make it that drivers cannot stop for rubber untill at minimum of 30% of the race has elapsed, and that from P11 downward has to start on the hard rubber, and cannot stop untill the 70% of the race has elapsed. But id also make it that those drivers who didnt make it into Q3 are the only ones eligible to get 5 points for fastest lap, meaning more drivers will do a Kimui in otherwords.
Pit stops should be part of the strategy, and giving the P11 and down something to aim for would improve the racing as a whole.
I think pit stops should have a full and frank discussion on, everyting from saftey (eg: wheels and car realease) to saftey car periods and how much they should play in a race strategy.