Oh yeah, I didn't think of doing that. LOLI don't think so, cuz after running Exp+Mira successifully (672v3 and 672v4) if you haven't run Disable updates payload there is no PUP folders inside Update folder.
I just checked my update folder and it is completely empty. I too ran the Disable Updates payload before and double checked that it had worked by checking that the folders had been created.
I dont know why Al Azif's DNS servers are not working for you. I have them set and my PS4 has never downloaded the latest update in the background and I dont get any update nags either when running games.