Please consider to join the openvpn-users mailing list for general usage of these new features in 2.3. Developers pay much more attention to the mailing list than in the forum.
If you find bugs, you'll also get better attention from developers if you either use the bug tracker (your forum login works there as well) - or report issues to the openvpn-devel list.
For mailing list info, please see here:
http://sourceforge.net/mail/?group_id=48978
Filing new bug tickets can be done here:
https://community.openvpn.net/openvpn/newticket (requires you to login)