I have mixed emotions about the finale. It was nice seeing some of the old characters again, particularly Jessica Brown Findlay (currently burning through Downton Abbey, and crushing pretty hard on her and Michelle Dockery.) That said, the whole resolution to Simon and Alisha's arc felt rather rushed, likely brought about by the actors deciding to leave the show. Better tie that thread up in the last ten minutes!
It works on paper, I suppose; A grieving man goes back in time to save the woman he lost, and be with her one last time, knowing full well he'll die in the process. Having them stuck in an infinite time loop is just somehow unsatisfying, however, especially since we'll likely never see them again. A fourth season with only Kelly, Curtis, and Rudy is not terribly appealing.
Other random thoughts:
- Simon wearing the orange hoodie was a nice callback to the masked man's first appearance on the show.
- If you were immune to other people's powers, wouldn't that also include the power broker's ability to remove said power?