Kernel namespaces are enabled for Centos in order to make Neuton metadata
operable. Ubuntu 12.04 LTS supports kernel namespaces support out of the box.
RedHat will enable kernel namespaces in upcoming RHEL 6.5 release.
Updated Cirros image is included to the Fuel ISO with fixed `cloudinit` - I thought you forgot spaces between "cloud in it" =)

Overall, it's unclear what "metadata issues" has actually been fixed. You describe some updates and additions, but don't tell the story about them.