I liked the demo a lot but, there is few things that make the game look ugly...
The jaggies! You can see them on the outer parts of the players and home plate umpire.
The base running animations... I saw two highlights of Yankee players rounding third base, and both times it looked really weird. If I remember correctly, they stopped at third base then took off for home a second later. Looked really bad, and it did not mimic how MLB players run the bases.
Another ugly base running animation...Diving back on a pick off attempt. Why does the runner dive back so fast? It looks odd.
The crowd in the outfield seats looks like it's from a PS1 game.
I saw Jimmy Rollins "snap" into his batting stance. I know me and some others were really bugged by this "snapping" in 2k9. After I saw this, I was on the lookout for more "snapping", but I didn't see anymore.