Looks ok as an all-rounder. Obviously you can push up the module effectiveness with more engineering, but all in good time. I'd probably ditch the AFMU (you'll rarely use one exploring let along if you're in the bubble) and install a collector controller to scoop them materials quicker.
Trouble with all-rounders is that it won't do anything particularly well. This is why most CMDRs tend to have task-specific ships.
In a RES you should be fine, however a CZ is a different matter - you're fighting against engineered combat ships not dodgy pirates. In a PVP situation, you'll likely get chewed up with those shield and armour resistances. That's no reason not to give both CZs/PVP a go, but very much plan on a retreat or rebuy screen. For sustained combat, I'd suggest switch out missiles for multicannons and drop the scoop, cargo rack and dune buggy for hull/module reinforcements. Swap them all back if you're not planning combat.
Seeker missiles are fun and thats all the reason I need to use them on run-about builds, but they are not very effective in sustained combat like CZs and PVP. They have a long lock-on time, limited ammo and are rendered mostly worthless if the target has a point defence.
Your build is fine really and if it makes you smile, then its great! Fly dirty CMDR!