I could be cynical and point out that:
a. An expected side effect is that the price of oil has started to rise, of benefit to all main protagonists.
b. As DeGaulle pointed out grudgingly about the British, they always had the sense to fight their wars in other peoples countries, and Yemen joins Iraq to the list where Where Iran and Saudi are fighting their regional hegemonic fight.
c. With Iran poised to become a nuclear power and Pakistan presumed to be a current or planned supplier to Saudi, perhaps it is better this were sorted out sooner than later.