Just popping in here to say that btrfs is not ready to be default in Fedora yet. Optional is fine but not default.
OK good, that's definitive. Thanks Josef.
So my thought is Workstation WG choices: parity with Server WG, whatever they choose; or plain ext4; or keep things the same with LVM + ext4.
And on the question of an alternate choice (what currently appears in the Automatic/Guided path's Partition Scheme pop-up menu) the WG's might consider this too, even whether an alternate is desired. Because from a my personal QA perspective, I'd like to see the two products agree on either the default or an alternate so we don't have four total possible paths combined, which today means 100 testable outcomes. One or two paths is ideal; three might be OK. Four is like… chickens with no heads, running.