I don't see why that would be a bad thing. For some years the Sky At Night has looked pretty dusty, and maybe an injection of fresh talent and a new slot on BBC3 may rejuvenate it for the next generation. And it wouldn't hurt for it to have a female presenting it - Stacey Dooley perhaps?
Strange that you should pick that name. I was entertaining idle thoughts about who would be the most inappropriate presenter they could possibly choose (on the basis that would be the one the Beeb went for) and her name was, inevitably, top of the list. So commiserations! it appears we both have the same warped sense of humour.
I can see how the first episode would start:
Hi all, I'm Staaaaceeeeey and I'm the new presenterer of the Ski at Night, which is all about astrono ... astryo .... astronology - innit. Now here are some picture someone took - aren't they pretty.