just in case since you don't mention the fix, I know the kk audio bug has a fix with g2tweaksbox over in the faq of first post it explains what needs to be done
Seems like my restore has caused a bootloop. Everything went accordingly, except the installation of SuperSU afterwards. Kept saying it failed to copy to the system folder despite system being mounted. The bootloop started when trying to boot into system after restore + failed SuperSU installation.
Edit: Fixed the SuperSU failure to install by wiping dalvik etc. but bootloop persists. I somewhat assume this is because the restore function doesn't work when the current ROM is different from the ROM the backup was made with? The backup was made with D802 20b firmware and the current ROM which is the one I flashed was the D802 20d firmware. Am I on to something?