Yeah, I do agree with everything you wrote there, even the Rough similarities/influences (so I take you finished Rough already). As I mentioned before, Cross Game went to pick a lot from Katsu in style and then to pick the baseball themes of past baseball Adachi mangas.

The most notable exception is of course H2, where I (and seemingly even Adachi) had no idea how it would turn out.
Haha! I'm inclined to think this way too. He probably ended the manga that abrupt way so that he could escape from the mess he had done.