Her attempt to use Art's style, music, voice, promos, etc. as a career gravity-assist maneuver was always unsettling, and ultimately, macabre. Early on, when it became obvious Art's possible return was merely a disingenuous lure, many of us urged her to basically shut the show down, and reboot with something totally new, reflecting her own style, music, and interests.
Instead she doubled-down and further wrapped herself in his legacy, stepping into the role of carrier-of-the-torch, which was both a ridiculous overreach and also filled with all kinds of baggage that weighed the show down. I think she may have had some success with her own podcast separate and apart from all that, but she seemed to have no interest in any suggestions that would pull away the perceived foundation that Art supposedly built for her.
I think she had two choices: copy Art in all respects but be all business about it, catering to those who listen out of nostalgia, or go her own way and make it about herself and her interests -- a limited appeal and indistinguishable from countless others. Her mistake was mingling the two approaches.
She made a good effort at the first choice but the lure of self-indulgence was too much. Put any lonely, needy person in the spotlight, though, and they'll probably do the same thing.