Nobody should ever have to reprogram the thermostat! At worse, just turn off automatic DST adjustment entirely and manually adjust the clock on the thermostat at the same time as resetting all the other clocks in the house. Changing the clock time by an hour is generally easier than changing thermostat programming, and needs to be done at most twice a year.
Now, the change in DST dates will break the existing automatic DST compensation, and it would be nice if there was a firmware update to fix that, but that's not likely for a cheap device like a programmable thermostat. And how important is the feature, really?
Dave