Shay needs to go to a big club and pull off the saves that get you points or get you a point where you don't deserve it. Not sure that will happen, he's not playing enough for City. The top goalkeepers have to have 100% concentration but again City are a revolving door.
I remember vds at fulham once making a howler and he said that he probably wasn't as motivated as he could be. I think we're seeing a goalkeeper who could have been better at other clubs. I take your point that he don't come for crosses, but at the same time are we calling him a coward? Perhaps with better coaching...but it's tough.
The thing with Shay is I don't think he makes players nervious. I think he has the respect of his defenders but you need the right conditions