(1.) A person should not be "teaching" others or "showing the way" until they can easily replicate, let's say, the static "ki-tests" that Tohei uses in Ki-Aikido (well, I'm talking about the ones I used to see in books years ago).
(2.) A person should not be teaching moving exercises before they themselves can exhibit reasonable/consistent movement that has ki/kokyu skills throughout it at all times and movement is led by the hara.
(3.) A person should not be teaching Aikido waza, in my personal opinion, until they're fairly consistent at #1 and #2, but of course this is not going to be the case, in reality.
Would you be so kind as to provide a 'short' list of those that you believe are qualified to teach aikido waza?