Oh wow I was so creeped out, I loved it, that was thrilling 😭 The Doctor and Donna's banter is so much fun to watch and the scene with Wilf at the end was such a nice surprise and so touching considering Bernard died shortly after filming. The world is falling apart and everyone is going insane, Sylvia, Shaun and Rose are hiding somewhere but in true form Wilf is out there keeping watch, waiting for The Doctor and Donna even in his old age in a wheelchair. That's Wilf.
I don't even mind that they mentioned some things from the thirteenth Doctor's era because the Flux destroying half the universe deserved to be given some gravitas and David sold it.