Hi Hangingon
I also loved your e-mail to your T, and agree that it is VERY courageous that you did that. I could never imagine saying those things to mine!
I took away from her e-mail to you was that maybe she was trying to make you feel better by saying that it isn't unusual for private practice therapists to have to switch their schedule around some to make it seem more "normal" to you. I think it was worded a little weird, but also her points didn't connect very effectively. Maybe therapists that work in the public sector have a more scheduled day to day clients (like in a hospital setting) that doesn't vary that often. I don't know. It is a little odd, but nothing worrisome, I don't think.
I think maybe she was also trying to make you feel better about mentioning where she will have to work in a different town becoming "permanent" is something that she must already have been doing. Maybe she thought it was only temporary, and turned out to be permanent? Maybe this will effect the way she schedules you in the future?
I don't see it as her wanting to end therapy with you, but maybe some things will be changing--but maybe that is GOOD for you! Maybe it'll force her to have more of a concrete schedule with you.
And she's right...you are NOT worthless!