ok, I'll give you the pushoff. The ref was right there and you do have to be more careful when he's right there. but I will concede the point that it was a judgment call that was could have been bad.
however the ben touchdown stands because the ball broke the plane before his arm was compressed by the defender. That was the point at which the ball came close to the shoulder. As for him scoting the ball up, everybody does that to try to get a couple more inches.
But what really got seattle is that they dropped a lot of key passes. And you are right they didn't get urgent until it was too late. The steelers are ball hogs. They eat clock and 8 minutes means you need the ball back now. If the steelers played like this in indy, the colts would have walked right into the superbowl.