PolarSSL has already been integrated with OpenVPN and its options -- ciphers, key management -- may be more apropos to integration with non-OpenBSD platforms.
However, that is entirely conjecture. I have not seen any traffic regarding this on ports@ or misc@ or tech@, and I haven't used OpenVPN in more than 15 years.
For more than guesses, you might ask Stuart Henderson. He's the developer doing the work, according to the log.
