SoT has potential to be a successful new IP. How successful I don't know, but xbox fanbase sure love multiplayer games. This one will easily be the best selling new IP for ms this gen if done right.
That's a pretty low bar, though.
MS have a big problem with first party games and original IP. They could get away with it during the 360 era as they had a year head start, cheaper console and superior third party support. They aren't getting away with it now.
They have systemically been destroying their ability to diversify too, buying developers like Lionhead and Rare just to basically run them into the ground, paying third party developers to make exclusive games just to pull the rug out from under them and sometimes destroy the poor developer in the process.
If I was an Xbox One only owner I would be pretty unhappy right now. Unless I really, really, REALLY loved Gears/Halo/Forza.
Sony have invested in developers and the industry to create a broad portfolio of games and talent to support their consoles. MS clearly don't care to make the kind of sustained investment Sony have, and are trying to take the easy road to success - the outsourcing model, which requires less risk from their part and more risk from the poor developers that get screwed over like Platinum. It isn't a positive thing for the industry.