I'm currently building my own version of openwrt with btrfs acls built into the kernel since the default openwrt configuration breaks support for most btrfs receive operations (receive fails when trying to pass acls to non-acl fs, etc.). Additionally, in order to block mount btrfs devices I also have to run a "btrfs device scan" on each reboot prior to mounting. I've got this all going with startup scripts, etc, but it would be nice for openwrt to have better btrfs support by default, at least on platforms with sufficient flash.
Is this a feature request?
Yes, multiple feature requests, specifically btrfs acl's enabled by default and more reliable mounting on boot.
(Moved to the Feature Requests category)