Re: ineffective technique from sensei?
Perhaps there is an opportunity to ask your teacher to throw you after class....maybe investigate the technique a little deeper. This is a situation where, likely, you can point out the portions of the technique (without opening your mouth:-) that are weak. This is an honest exchange of information through the technique. He will be grateful...I hope, and, in my view, you have taken the most useful and honest approach to clearing up your doubts.