I don't quite know why Tampa Bay is only +1.5 against Atlanta.
Tampa Bay should have a lot of motivation coming off two big wins and wanting to go into the offseason on a high note. However, Atlanta should come out pretty fired up wanting to finish with the first consecutive winning seasons in the program's history. I'd call any 'motivation' advantage for the game a wash.
After giving Tampa a few points for home field, I still think Atlanta's talent is so much more than Tampa's that they win by at least a touchdown with the potential of this game being a blowout.
Good luck.