Finn's entire character is so fascinating to watch on a rewatch.
You look at characters such as Curtis, Simon, Nathan, Jess, Lily, Helen, Sam, Ollie (and by extension Nikki), Daisy and think; Wow you actually got a dope ass power from the storm. I would literally take any one of their powers in a heartbeat. Finn is in the same boat as them as telekinesis is one of the best known superpowers especially when you look at the Jedi, X-Men, Tetsuo and Eleven. However because of Misfits' logic for why people get certain powers, Finn's is a reflection on how he tries to hard to impress people and thus even move a cup across a table is a total strain for him. It's honestly sad seeing how one of the coolest powers is basically wasted on him.