There are two products I would love to see that would be a perfect complement to your existing product line.
1) A modern automatic switch machine detail part. Something like this:
A single plastic part would probably be the simplest, something that could just be glued down
to the extended wooden ties.
2) A "classic" switch throw, which turned. This is a little tricker, at least in N scale, but I don't think that hard. The idea here is a plastic or cast metal bit, with a hole drilled in it, a bit of wire, and two brass "heads". It would sit off to the side of the turnout, use a small hole drilled in the throwbar, and show the direction in which the turnout is thrown. You couldn't use it to throw the turnout, too small, not hand friendly. It's a looks detail part only.
I dunno about anyone else, but at a reasonable price I'd probably buy one of either with every QuickStick I bought....