It seems like NC & UML are in favor of direct presidential rule with the help of Nepal Army. President then  will hold the fresh round of CA election which would be better option for NC & UML instead of election held under Maoists led government. Because let there be no doubt, if the current Maoists government holds election, be it by threat, bribe, FALSE hope, they will win the two third majority.

My point being, the current uncertainty and lawlessness helps create case for presidential rule.