I use to do live sand and switched over to barebottom, the amount of detritus that accumulates on barebottom is amazing. The snail poop is most of it. So before the live sand would hide the detritus or where live rock touches bottom. Over time it will lead to greater maintenance issues. The vortechs or similar efficiency pumps save in the long run. I use to buy sub par pumps eventually end up breaking down or other issues. Flow levels would deteriorate over time. Could be impeller issues and crud getting inside.
Lighting, I have radions and AI's.. I do notice growth with LEDs the colors aren't intense could just be a learning curve for them. All my tanks have flatworms..they aren't smothering corals yet. Pretty much every LFS has them on their corals. And it's just a matter of time before your corals end up with them.
Lot of the stuff is not truely essential, black PVC just looks nice.