1 ° an oem installation mode (which type of installation where the system is going to be installed and the users only configure the keyboard, location, language and the user account
2 ° Discover as a method for installing and updating applications
3rd BTRFS file system by default because it allows you to create restore points of the machine which I think would be interesting for rolling version
I decided to post in the forum because I thought it would be easier to discuss this here than open several bug reports.
And sorry for my bad English