References:
FESCo, make Btrfs the default https://meetbot.fedoraproject.org/fedora-meeting/2011-06-08/fesco.2011-06-08...
Workstation working group's technical specification, make btrfs default https://fedoraproject.org/wiki/Workstation/Technical_Specification
A point of reference that when LVM thinp was made release blocking, it was stated that usability issues are to be treated as bugs to be worked out https://meetbot.fedoraproject.org/fedora-meeting/2013-07-24/fesco.2013-07-24...
File system choice is up to the working group https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/...
--- Chris Murphy