@CrisQ Oh, first and foremost, 谢谢 for sending this, really appreciated! ❤️
About btrfs I know that I can just use manual partition from installer for btrfs, but I cannot do encryption on btrfs.
So my suggestion was to use btrfs as default instead ext4, so you dont have to create partition but just some subvolumes.
Infact for me disk encryption is the most important feature, I can use ext4 but I think btrfs is better in this case.