Well that's never happened but if you know so much better why do you need a teacher.
There is a time and place for free-style. If a sensei asks the people to work on a particular technique - that is what you should do. Anything else is just simple disruption and arrogance.
Is your teacher flawless? Or maybe you are not very observant? Perhaps you are unable to learn from others' mistakes.
The fact is, in the history of Aikido, the same technique has never been performed twice. There is ONLY freestyle. And if you act according to an imagined ideal partner, rather than the one in front of you, you are not learning anything useful.