Nope.
No changes to the VPN client screen matter. you can make the change, apply then see the results but the original value is still displayed on screen and it will revert to that status if left alone.
I have an open VPN client set up on my router but in the interest of domestic bliss I turned it off as it disrupts some of the streaming services my family frequents. I turn it off and eventually it will turn itself back on. No router reboots etc.
Just going to the VPN section displays wonky...
I tried to follow this thread because i have the 3200 with 384.3 but as soon as op said they were running this firmware and turning on WPS I figured there's no point...