There is no Mainstream AC in this area. The Rose has been leaning Hot AC for at least the last five years, and there are female listeners who would enjoy music that is contemporary but a tad less shrill, and the same goes for the announcers. Bringing back the WARM brand after a two-year hiatus may not be the boneheaded move some people may think. (Or perhaps it will be, and listeners just won't care. Time will tell.) Paul Scott would be a good fit for that type of format and if that's what they're planning they would be wise to bring him on board.
If it were my station, I would take it CHR. The void for that in York is immense. However CHR is a cyclical format which has experienced dramatic ups and downs over the last 20 years. Mainstream or Gold Based ACs, which don't rely as heavily on who's hot at the moment, can go on and on if done right, and make lots of money in the process.
Of course, bringing back a brand or launching what you hope will become a new one won't mean a thing unless you are prepared to heavily promote it. If you don't put any resources into marketing the product, you may as well be playing carnival music.