At the risk of sounding pedantic, with any change, from DRS to disinte-Pirellis to spec weight, I think what needs asked is what is the sport's ultimate objective, and how does the proposed change better support that objective than what exists now?
Setting aside what I think F1 is about (or should be), even putting on my contrarian's thinking cap, I cannot fabricate any 'realistic' objective that would be better supported by reducing the number of pit crewmen, or arbitrarily adding mandatory pitstops.