crashjbv, thanks for the comments! This was an "Initial Impressions" piece based on the first few hours of play, not the full review, which will run soon. I'm glad you're seeing unforced errors on harder difficulty levels. I'm still not, but I'll accept that maybe there's something about my play style that's affecting what I see.
I also agree completely that another year could produce "an incredible game." I'm also a very harsh critic of tennis games (I'm not a 4.5, but I've played a lot and also coached a few years), so I might be a little too critical. But my overall impressions of the game are more good than bad, as you'll see when the full review runs.