I think Gaga is finished with her album. While filming American Horror Story her team is going to finish all the little things.
I mean look at who she worked with:
Diane Warren - Already said she is done in February.
Elton John - Said he was done in January.
RedOne - Said he has done 8 songs which had to be done in September 2015.
Mark Ronson - He is going on a lot of Festivals now.
Giorgio Moroder - I don't think he will be on the album anymore. He is also in Italy