I don't know about the spindles, but those are definitely drop arms. Shorter sway bar end links, too. Looks like they at least didn't cheap out on the drop so that kinda tells you the PO cared. You can sell/trade off the drop parts to put it back to stock and/or a little higher and it won't cost you anything but your time and an alignment. The helper bags could just be to keep it from bottoming out when loaded. I doubt they'd go so far as to pull a leaf to drop it.
Coincidentally, I was behind a truck today with a Carven sticker on the back glass, so I rolled the windows down to hear t when the light changed. No idea what model of Carven, but it had a pretty nice sound to it. Definitely didn't have the cheap redneck Flowmaster noise. It's cool that it already has at least one mod on your list.
I'm betting those wires feed an HID or LED headlight relay harness.