What do you think of this?

[gsf23]

Same thing here, I can't see giving the runner second base when the bases were loaded and the catcher is holding the ball. Maybe if there wasn't a runner at first already or the ball gets away from the catcher, then maybe he would get second base. The way I read the play, I give the DDB signal, see if the runner makes it to first, wait for the play to end. If ended like you said with a runner out at home, runner out, batter at first where he would have been without the obstruction, play ball.