sorry to hear you are going to lose your regular training session.
i know how much we all get attached to our classes and our instructors.
i have had some "unwanted" changes in my training in the past year or so, and although i was disapointed at the changes or a sensei leaving i was very impressed with the new outcome in my training and with my new instructor (just in case he reads this).
sometimes a change is for the better even if you cant see it just yet.
keep training hard and im sure everything will work out just fine for you.