In version RouterOS v6 update is planned OpenVPN support for UDP and compression LZ0?
If that would be the case I believe MT would remove OpenVPN from their products completely, not just leave a semi developed solution that is usable only in certain cases....It is possible that they do not want to touch OpenVPN because of licensing issues. They do not want to wake-up the dragon as they know he will eat (sue) them.
OpenVPN Technologies, Inc. owns all of the rights to the OpenVPN core and maintains a dual license for the use of the technology. We support a license under GPLv2 along with a commercial license where appropriate without the restrictions of GPLv2. Please contact our sales at email@example.com), if there is an interest in commercial license
Well if Mikrotik has not commercially licensed OpenVPN and has not released the full compileable source-code of their changes (cutting features and claiming compatibility with original is a change in terms of GPLv2) then they have to stand still and hope nobody will notice so soon.
So and now ban me (again) and delete this post or prove I`m wrong.