The main reason that I use your firmware is the IPv6 support
I much rather have IPv6 suppert without iptables support than no IPv6 support at all (in fact I dont use iptables at all, neither IPv4 og IPv6, since I do filtering elsewhere). I have a static address on the WAN interface and a /60 routed to it. Autoconfiguration and routing announcement works fine on the inside.
Maybe IPv6 could be optional, a checkbox somewhere to enable it, and a little notice about it not being "fully" supported?