I haven't seen the red card offence yet, but please do not fall into the pundit's trap of making any statement about playing the ball - it is completely irrelevant.
Indeed. I had a very similar incident last season, when an away forward chased a bouncing ball going towards the home keeper from a back pass. The keeper ran out of his area to kick it but before he could do so the forward slid in with one foot straight out a foot off the ground, knee locked, and played the ball towards the goal. The GK kicked through, but the ball was no longer there. Instead he kicked the bottom of the forward's foot. The forward's momentum / locked leg and the straightening of the GK's leg meant that the goalkeeper somersaulted straight over the forward, landing on his back six feet beyond him. Initial reactions were that the GK's team mates were horrified at the challenge, but that quickly changed to "but he played the ball!" and they then thought it was just one of those things that happen.
I think it's fair to say that everyone on the pitch was surprised when the red came out - one of them did say "but it was only one foot!" - but it was the worst challenge I've seen in several years and obviously a straight red. The keeper was taken off in an ambulance with serious ligament damage. The one in this game is similar although the force is not as high. I'd consider that a red card all day. Any challenge where you challenge an opponent with force, with your foot stamping down and your studs going straight down towards the opponent is dangerous.
On my game, the home team manager told me after the game "good game ref. If you don't want to put the red card in, we won't mention it!" They thought that since he'd played the ball it was an accident and just one of those things that happen. After all, that's what the experts say, isn't it!
Watching Sky while the game was going on, I thought the comments these idiots were making about Graham Scott were completely inexcusable, even if they had a point and the decisions were wrong. Having seen what they consider to be a wrong red card (not even a foul, according to one of these "experts!") I think that they've lost any credibility they may have had regarding any other decision made in the game.