I think Mills is rated way below Jones for a reason. So the obvious answer is, I doubt it very much. Hopefully Jones is there at 15, and hopefully the Pats are smart enough to take him.
It all really depends who’s there at 15 as well what the Pats do prior to the draft. If they sign or trade for a QB who they still feel has a future, like Garappolo, then the game plan changes. Also, if someone like Davante Smith, Jaelon Waddle or Kyle Kitts is still there, they would be a steal at 15.
Also, they could trade UP to select a QB they like better than Jones. A lot of options. But if they answer the WR/TE position in FA, my preference is they sign someone like Fitzpatrick and draft a QB in the 1st round, either at 15 or higher up.