I encourage you to watch it and form your own opinion (just make sure to get past the first ten minutes of the pilot, the tone shifts dramatically).
Captain Ake runs the Academy and commands the Academy ship, the Athena, which is used to do more hands on training but isn't the flagship by any stretch. She's more like a principal than a professor. The other main characters are cadets, with some strong supporting characters too.
IMO it's the first live action Trek show in the new era to come out firing on all cylinders and it's great to see.
Btrfs has a bunch of features and is one of the contenders for the "next" filesystem. Ext4 is utterly bulletproof though and has good enough perf so it's still your best bet unless you specifically want to use the advanced btrfs features.