Supreme court has decided that they can caste their votes, but the votes won't be counted.
Individual votes, when they consolidate to become 15 within a party holding thin majority in the parliament, they count. 15 votes can't decide about the future of other 150 votes specially when those 15 members won the elections on party ticket.
Sorry, no one can give it any kind of spin. People vote for Imran Khan's, Bhutto's, or Sharif's vision and manifesto, a handful number of people can't decide after taking votes in the name of the party. If they are so concerned, they should resign, go back to the public and expose the government. If public (that consists of learned people as well) understands their concerns, it will not vote for the same party again.
And the constitution talks about votes in relations to:
(i) election of the Prime Minister or the Chief Minister; or
(ii) a vote of confidence or a vote of no-confidence; or
(iii) a Money Bill or a Constitution (Amendment) Bill;
Meaning, even money bill that is passed multiple times in a government's single tenure.