I can see why she chose to do this but Azealia is a FANTASTIC rapper and songwriter and would have surely elevated the material
While I agree, I think that it was for the best that she isn't on the album. Gaga probably didn't want the backlash that would ensue if she worked with her, with Gaga's anti- bullying message and the BTW foundation. What more then likely ended it was Azealia herself with her constant rants and messiness on twitter. (Her using the "F" word is probably what did it)