There's a lot you can tell even this early in the season, though it does take a few weeks to settle in for most programs (especially before they face conference play).
If a team is ahead, how do they use their players, if the team is behind how are they using their players. If way ahead, they should be giving everyone an opportunity to get at bats, pitchers in, even if for one inning or one out, if they haven't done well, they should be using others to see how they will do. Watch lineups as well, if the team isn't doing well and sticking to the same lineup, for me that tells a lot about a coach and his philosophy.
If you have a pitcher, you should be aware of how they are used, that is VERY important.
In a few weeks, Boyd Nation will come out with a pitch count watch. Important to pay attention to that.
JMO.