btrfs is one of the alternatives we plan on supporting. In fact there is already an experimental branch with btrfs support. However, wearing my user / operator

btrfs is one of the alternatives we plan on supporting. In fact there is already an experimental branch with btrfs support. However, wearing my user / operator hat, if I had to choose I would stick to aufs in production. If I had to switch (and the apparently stupid move by ubuntu to drop it might indeed force me to), I would first try to use more proven code, like lvm or raid/dm. btrfs and overlayfs are neat, promising technology for the future - that place where our production deployments can't go :)