I think it would be good to have support for F2FS, Samsung's new Flash-Friendly File System, in our install media for amd64, x86, and arm. This requires the CONFIG_F2FS_FS kernel option to be set, and sys-fs/f2fs-tools to be included.
http://git.overlays.gentoo.org/gitweb/?p=proj/releng.git;a=commitdiff;h=607785ed1fa9c12a2bf21c6c6093c5c91062b261 Updated amd64 specs. We'll have to wait for next successful build to confirm.
Tested and current minimal install isos have working kernel and userland support for f2fs, closing.