Name a show with that much clout and esteem where they could literally write their characters off screen tho? The episode as a whole is a perfect finale for the show. Theo graduating college is the end goal. It takes something which was a key plot point in the pilot, Theo’s grades and lack of ambition and lack of focus, and shows how far he’s come to now be a college graduate. That was cliffs goal. To make sure his son didn’t end up a bum. That is good writing. If you really want to complain about a throwaway gag(them dancing and the camera pulling back) then I don’t know what to tell you man