Thank you Zimprincess, just sent the Islamabad CHC an email. I submitted an upfront medical but received an MR again. The Abu Dhabi CHC takes two weeks to get back to a CSE which is quite frustrating!
I think your case will be stronger next time with a renewed work permit. GCMS notes will provide you more insights though. The reasons provided for refusal definitely don't seem to add up.
Good luck for round 2, the 8 week processing time shall make it easier!