Hmm from the look of it, it's not clear Hawk eye does everything.

Certainly it does pace. But from the article it's hard to say if it would track spin - it's not clear to me that with the natural markings on the ball (seam lines + ballmaker logo) and the lighting that exists in the stadium, that would be enough fidelity for some algorithm to calculate the spin.

I think Hawkeye could be updated to easily do it though, and maybe if they would be willing to draw 1 or 2 black dot markers on the ball in addition to the natural markings.