I tried it. It was not easy to figure out how to use anaconda gui to setup
install into a subvolume - but I got it done. I now have 3 subvolumes:
sudo btrfs subvolume list /
[sudo] password for nbecker:
ID 256 gen 1818627 top level 5 path home
ID 259 gen 1818478 top level 5 path root
ID 487 gen 1818625 top level 5 path root00
But if I try to boot with 1st grub entry, I get:
dracut-initqueue warning could not boot
starting dracut emergency shell
If I try to boot off the grub entry labeled 'rescue', it boots OK.
dracut says something about fixing initramfs.
Those who fail to understand recursion are doomed to repeat it