Mack doesn't really have much of a subplot either. I don't really count his bromance with Fitz to be significant enough to call a subplot. Also, his possession thing ran its course once Raina and Skye/Daisy (it's weird calling her that now) were in the chamber. I would have much rather that Mack get killed off than Tripp. Tripp was actually charming and likable. I don't like Mack at all.