I like it. If it saves the hassle of destructive removal (hacksaw, acid, etc.) then so much the better.

IMO, it would be better if the frame was mounted upside-down, which would allow the seatpost and seat tube to be filled with penetrating oil. Let it sit overnight and I bet the seatpost pops right out.

(I salvaged a Schwinn Superior frame this way. I filled the seat tube with Liquid Wrench, let it sit in a vise upside-down, and the seatpost let go on the first try.)