Let me state that I agree with the philosophy of Aikido, and the belief that competition is wrong for the Aikikai. But I think that individuals should be able to test themselves. I'm not saying they should make a career in competition but do it as a one time test of themselves.
As for the rules they seem to allow almost anything I don't see an aikidoka at a disadvantage under the rules they have.
There is a difference between competing for ego reasons and that of a test of oneself.