If she had continued the era with a DWUW video in November & already released a new single to radio we wouldn't having all this problems tbh.
Sure, ARTPOP wouldn't be #1 anywhere still but at least the album would be selling decent WW and the ticket sales for sure would be a lot much better.
Tbh it's her own fault that ARTPOP isn't selling. It was never going to be #1 but there was a lot more she could have done other than drop it for months.