Comment 2 for bug 364101

 nm-openvpn does not support *most* of the openvpn options. Just compare number of checkboxes with the number of openvpn options in man page. Most of these unsupported options are obscure enough to not be reported but some - like these ones, pkcs12 support, multiple "remote" options, up/down scripts etc. - are painful enough for some people. There are multiple bugs saying "it does not support option X"
 How hard would it be to support "I have my working config file, use it" advanced option? This would make mm-openvpn usable for people who simply cannot use it now.