4 instead of 5 only because the sloppy wristy-ness. I hope he doesn't get a chronic injury b/c of it. Otherwise his forehand is incredible (see: Match point against him last year's AO QF)
What you said.... and it's improving
Because there's always room for improvement
I think this is where he has the most to work on. If he had to be so scrappy when he was little, I don't know why he's so choppy now but it sounds like he knows this is really important to improve, so that is a good sign.
Focus/Mental: *** (it was about ***** last summer and I'd like to see it get back there)
He's getting better but as we saw last night, he's still spotty and still gets line calls and stuff get to him too much.
Net Skills: **3/4
He's getting so much better, and I love that he's now comfortable enough serve-volleying as a risk when he's down break point, to me that shows massive improvement.
And you forgot one...
As he said as of late, he knows this is huge. His returning is pretty poor now. he pops a lot of returns on easy second-serves out and if he could get on the ball and be agressive and get stuff like that in, he'd break a lot more. And since he's hard to break, if he can play better return games he'll be lethal.