Yep I agree with you I think.
Just curious if there was any lets say, ethernet routing advantage by moving to another router rather an using SH as the modem and router.
I'm not sure what you mean by "ethernet routing advantage". If you need things like jumbo frames, manual routing, high connection capacity, isolated virtual guest networks, custom DNS with caches, IPv6 support, logging etc. You won't get that stuff from a SH, so that's why you'd need a proper router.