This is an episode that shows how Legion has the ability to become one of the most distinctive shows on TV. The writers are telling us "Yes we know David is the strongest X-man, but how can we show this in the strongest and most imaginative way possible?" and they did not let us down. Sadly this is the last season of legion, and I have no doubt from what I saw in this episode that the writers and director are putting everything in it for us to enjoy.
Well done!