There really should be an easier way to get rid of old or misplaced buildings on your own claim, I don't care much about getteing my matierals back though it would be great to have some back, but it really takes too much to get rid of eg. misplaced walls.
The idea is to add an easy way to get rid of buildings on your own claim or buildings you have build, or by permission on other peoples claim something like that.
It can be very difficult to be perfect on building plans or foresee problems or changes to the plans you have, but currently you'll be sort of stuck with mistakes unless you have a ton of phlegm!