I'm not sure, but I assume, there must be a misunderstanding. See:
https://www.phoronix.com/scan.php?page= ... ates-Btrfs
...especially the comments. It appears, that BTRFS is deprecated for RHEL versions (<= 6.x) with older Kernels.
Personally, I am very content with BTRFS. I could make it install on two SSDs for different Sabayon versions (KDE 4.14.10 and Plasma) with such two partitions (SWAP and Root) and I am able to boot from. No need for separate ext4-boot partition. And the subvolume handling including snapshots work like a charm.
BTRFS is worth to go on developing it, there is a major support from several companies (e.g. Facebook).
*** I love KDE and I'm hoping for a Plasma coming with individual virtual screens soon
Take away Facebook from me and let there be real people again...