Pakistan has got Taliban and LeT and other terrorist organisations who just defeated Yanks in AFK so MRCA is nothing for Pakistan and not to forget they got Nukes as well Allah on their side.
MMRCA is expected to enter in service by 2016. PAF currently is running an all aspect modernization plan, the thunder project is likely to end in mid 2016 (around the same time when the Indian MMRCA induction is expected to start). PAF is and will remain committed to FC-20 as its front line acquisition after JFT. Dont think PAF would be moving to others since FC-20 is PAF specific project and will be tailored as per requirements of PAF, not like foreign acquisitions in which supplier restricts the freedom of choice.
And secondly lone LeT gets your Army nappy wet in Kashmir