BMarquis:
We're certainly aware of the problem and it is an issue we are working on.
Unfortunately GUI changes need new firmware (we cant modify the GUI permissions via TR069 or config).
I will, personally, assist anyone who wants to change those values.
Can you please PM me, I'm really trying to like this box and part of that is forcing myself to use it rather than just giving up and switching to an external device but this excessive lock down is really not awesome. An example is I have an IPv6 /56 routed to it but the box will chose a random /64 out of this on each boot which is useless for servers. Normally you just manually set your chosen /64 and you are good to go but in this case that's just greyed out.