This is all very interesting. No disrespect to Mullvad but will there be any effort towards attempting to get such functionality standardized? In the past there was a XOR scrambling patch for OpenVPN[1] to attempt to circumvent certain government firewalls and the OpenVPN developers had concerns about unaudited changes to the wire protocol.
[1]: https://proprivacy.com/vpn/guides/openvpn-scramble-xor-obfus...