>>94660752I for one prefer the idea of Keith being separated from the gang and turning purple whilst being separated for plot reasons. He nearly dies (preferably thanks in part to a group of people who hate him for being part Galra and/or a group of Galra mistreating him for being a half breed) only for him to be picked up by Lotor's crew in a genuine act of kindness.
Keith may be hotheaded, but he's not stupid enough to give himself away by running away or attacking them, so he plays along. He learns about the generals' backstories, finds out how Lotor's way of doing things are a lot more agreeable than his father's, and it's at least in part a sad and tragic moment when he has to leave them and go back to his old team.