Eyeball's hatred of Rose is around the same as Jasper, but whereas Jasper has a more sympathetic motive in that she was "born" into a war and was mentally unraveling over Pink D's death, Eyeball was around before the war and has a bit of a glory seeker aspect to her attacking Steven, "They might even give me my own Pearl!", rather than pure loyalty, while also being ungrateful to Steven healing her, making any chance of her joining the CG's near zilch. She even testified against him in "The Trial", so I doubt she would even want to stay on Earth. Navy hated being tricked over and over again and showed a slight sadistic side to herself in "Room for Ruby" (I mean, she could have just stolen the ship but she instead chose to emotionally manipulate Steven, Peridot, and Lapis, just to relish in their pain when she betrayed them). While her actions were technically justified, it adds to the idea that she more than likely wouldn't join. Army and Doc are a bit iffy cause we never got more in depth info on them compared to Eyeball and Navy. The only likely one is Leggy is a naive gem equivalent to a newborn, and seems to hold the least mentally dangerous qualities in comparison to her teammates.