OK, here's my dilemma boiled down to as simple a story as I can manage. I have been training at the same dojo for about a year now and have managed to avoid becoming involved in any of the "politics" I know have been occurring. This has never been a problem until recently. Several high ranking senior students have left and either started their own dojos, or completely quit training ( I don't know why they left). Sensei has tried to maintain regular class scheldules and seminar attendance for the rest of us, but without his senior students to help, I think this has become increasingly difficult for him. As a result, classes have lost some of their energy and flow, and I don't feel like I am getting the most out of my training. So my question is this: If I leave my current dojo to go practice with someone else (maybe one of the runaway sempai) am I committing a huge breach of protocol? I feel like I would be insulting sensei to do this, but I also feel like I need to find someplace where I get positive energy when I'm on the mat. Any suggestions?

Thanks