I'm also new to wiki-editing. However, I thought it was useful to mention (the obvious fact) that your kernel needs "tun" support.
Assuming arch users are mostly experienced users, i also assume they might have a personalized kernel (as i do).
When i tried openvpn, i got some error message and it took me a while to realize that i needed tun supported in the kernel, a feat that's mentioned the gentoo wiki. Assuming that this information was useful for me, i thought it might be useful for other users as well.
So despite your strife for brevity, i would not delete it.