Blast movement didn't seem to work for me. They blew a hole in the wall ok, but then they still went for the door. I tried to see if a following HQ section would use the breach, but no luck. I was playing a small infantry only download Bravo Company I think it was called, found it through the forums here.
I tried this 3 different times, each result was the same. Hole in the wall created but the infantry still made for the door to enter.