I'm more concerned at how they announced her over the season theme.
This is the first time a major pop star has been announced as a season regular on a TV show and Gaga is super relevant rn, so it's clearly just for hype.
If all of the seasons of AHS are connected like Ryan Murphy says they are then he better not miss the opportunity and reference No Exit in AHS: Hotel. It would make sense since Kathy Bates was stuck in that recurring time period at the end of Coven, so excited for S5!!
A clue for the Hotel theme was given in that episode where Maggie was talking about her past, and they had the flashback of her pick pocketing people in the hotel lobby What were the other clues?