I just installed tonights testing using calamari I went to the install options and went with the standard ext4 because I just needed it to work I have a suse tumbleweed install with btrfs, and I am playing with snapshots. Hope to integrate some interaction with that into Dolphin. If there is a couple options under guided, Standard-Ext4 and BTRFS with subvolumes for /home/ and /var/ I would be tickled.