I have an OOTP 19 online league...
 

Are there any new online league features? I can't seem to find anything. Anyone else with an online league in a commish position that might be able to let me know if there's anything important or noteworthy for us online leaguers? (Besides all the obvious stuff like the new depth charts etc) Thanks!

The short answer is no other than standard improvements to the base game. Having said that, I'm not sure what improvements you're looking for. Because of S+, online leagues are in pretty good shape.

Now as to changes in the base game I guess it's debatable, but I don't think there is anything particularly great.