Yes personal appearance is mandatory because new passport are MRP (Machine Readable Passport) and they have to encode your fingerprints and signature.
My brother-in-law was able to proceed his passport in Cebu DFA 2 months ago, so there should be any problem to proceed it in Tacloban.
Check carefully the requirements (see the link I gave in a preceding post here) to have all the papers required to avoid any additional waiting time. I'm thinking in particular of this one if it has to be amended: Marriage Contract (MC) in Security Paper issued by NSO or CTC issued by the Local Civil Registrar duly authenticated by NSO.