Changing dojo is a huge change. But not an impossible change. It will have to start from zero, and start new equity. 9 months isn't a long time but long enough for things to gel. To be in a rhythm and comfortable until this shit happened.
If you think it's tough to leave after 9 months, how hard do you think it will be after 1 year? 2 years? Or longer? What about if you actually get rank?
At 9 months, changing to a new way of doing techniques won't be nearly as hard as it would be after 1 or 2 years.