Yes, I just tried it. Selecting destination planet if that planet is yours does not work. Pressing End to submit all to a native planet also doesn't work.
And I'm getting better at it, I see it really depends on how much planets are around your first and the first planets of your opponents. I guess sofar I have always had them around the cpu players which really made the game a lot more difficult. Spreading these other planets out is a way of setting the difficulty methinks. Perhaps you could gradually increase the difficulty as the player progresses through them, although I think it will be a lot of work getting it right and not worth the hassle.