I was just about to quote that one line. To be fair to RedSky, he see's Smalling as a squad player but no way can you defend Smalling's lack of ball playing ability.
It's not if he can or can not make a 10 yard pass, it's his whole mentality and ability on it that makes him a bad footballer.
When you turn your back on the ball, shield yourself behind an opposition player and/or are not comfortable receiving it to feet, you have 1 less option to pass to. That's a passenger and I don't care how good the rest of your team is, at this level, that's a liability and the weakest link when you have the ball. Think about it logically, we have the ball most of the time and we want the ball most of the time, how the hell does having one player, who's not comfortable on it make sense? That's what people are criticising about.
Obviously it's not just him and ultimate blame should go to Mourinho for the lack of coaching/organisation we're seeing but you simply cannot ignore this and say 'it's fine cause he's a good defender'.
He's not a great passer but the funny thing is, if we actually were a high pressing team, Smalling's deficiency here could be massively made up for. He'd be winning the ball with his impressive athletic ability and passing to players within those 5-10 pockets of space HIGHER up the pitch. Being touch tight reduces those areas where he had to pass over 15-20 yards and make decisions on whether to bring the ball out further (spoiler: basically he doesn't).