Good for setup as you have less chance of locking self out. but bad in long term if it acts as intermediate between modem and network.

I don't quite understand what I'm missing here. I have lots of experience with modded router firmware, openwrt, tomato, ect. I am trying to use a nano r2s as router/gateway for my asus ac86r (running fresh tomato) but when I try and just setup the r2s openwrt as is, or customize routes and ips, I ca...