We use Weaver-style davits (probably a knock-off) on the swim step. Like BruceK's transom shown above, we have a door to the swim step and a covered cockpit. From the cockpit cover to the dingy we have a simple 5:1 block, which makes it easy for my wife to instantly raise or lower the dinghy. Instead of the Weaver-style hard stainless stand-offs, we have two small lines with carbineers also from the stanchions surrounding the cockpit cover, so it isn't just the block and tackle holding the dinghy. Seems to hold everything in place just fine in rough conditions and the dinghy takes less than 30 seconds to deploy.
We have an outboard motor mount left by the prior owner on the transom, but I plan to remove it because we now just leave our electric motor on the dinghy. The motor mount makes it difficult to get off the swim step to the dock.
I did make a little hack to the Weaver-style hooks. I figured out a way to hold the clip open so that you don't have to slide it back and lift at the same time. Also keeps the clip open for returning to the mother ship. My wife finds it much easier when she is in charge of casting off, which is generally the case. Probably better if I get a picture of the simple modification instead of trying to describe it.