As a UA 1K, I fly US about 20 or so times a year now. This really hurts people on the shuttles.
I accumulate MP miles on my US flights and will be curious to see how this affects that.
And just a little input from a former US CP who got tired of the nonsense from the old US: Letter writing gets it off your chest and makes you feel better. If you want to make an impact on US, LEAVE THEM. Find another airline. The only real way to let US know how these decisions impact the airline is for customers to STOP BUYING TICKETS.