My layout's wiring (10x20 feet, single deck, central aisle, longest runs about 20 feet) is unchanged since it was wired for DC from a central control panel. My feeders are my bus wires: they run all the way back to the central location with the boosters, command station, and other electronics. Most of the electronics is on a roll out stand below the panel.
I try to minimize the number of connections, amount of wiring, and electronics distributed around under the layout. So, my 18 gauge block power wires are soldered to the rails on one end and plug into block controls at the other end. I admit they're bigger alongside the rail than I'd prefer, but pretty much disappear when painted rusty brown along with the side of the rails. To me, it's not worth connecting the 18 gauge block wiring to short lengths of thinner wires just for cosmetics. And, no, I don't use any point along the wires for test points.
It's my version of "keep it simple, stupid".... It isn't what most people do. It probably wouldn't work if my layout were much larger. It doesn't lend itself to snubbers on all the block wiring, effectively each one its own bus. So far, it has worked fine for me. YMMV.
