I don't see a stat report for just "league" stats in the newest edition. How do i add this? And what about a "Non-League" report?

I don't think so. But you can easily create one:

For example, duplicate an "Overall - Exhibition" report, edit the report and modify the "Additional Instructions" to have:

g.GameType="League"
GROUP BY p.ID 

instead of:

g.GameType="Exhibition"
GROUP BY p.ID 

For a non-league game, you could do something like this:

You can also view other examples from the following default reports:

Overall - Exhibition
Overall - Pitching (Exhib)
Overall - Post-Season
Overall - Pitching (Post)