The first is just a reminder that you can change course names in the TGC Tools. The benefit is that you can use 32 characters as was the case in the past, but not in TGC 2019 where you're limited to 24 characters. There's no in-game limitations, just a limitation in the text entry box in the game.
The second is that there are some situations where when adjusting teeboxes after manually or automatically creating holes that the par values can shift. This feature shows an external scorecard so that yardages and total par can be quickly checked before publish or quickly viewed for making digital scorecards. The yardages won't match in-game exactly, but are very, very close. The game rounds slightly differently, up to you to determine if you are OCD enough to require going through every hole/every tee the old way and writing down the numbers.
This change was inspired by VctryLnSprts 's excellent scorecard graphics. Not nearly as pretty, but hopefully useful.
Additionally, every option on the first "Course Tools" tab will work with Fictional courses as well. Feel free to try them out and have fun.