The reel foot standard states a tolerance for each dimension (see the drawing below, as found at the AFFTA web site). Still, those tolerances are small values. For comparison, a sheet of common writing paper is 0.003" thick.
Please understand, I mean this in the nicest way I can. The reelseat you show is beautifully made. The wood insert is stunning. The metal work is exquisite. The design is functionally poor. I realize this is a traditional design made by many respected manufacturers. How often have we seen recommendations to put moleskin under the reel foot, or loop an O-ring/rubber band over the reel foot, all to keep the reel on the rod?
With the traditional wood insert slide band seat, the reel foot is pinched between an untapered, rigid ring and polished wood. The ring is canted and only touches the wood along one edge - an extremely narrow contact surface. Neither the wood insert or the slide ring have any give. The reel is poised to pop off the rod at the most inconvenient moment.
The traditional Hardy design (photos below) is a well designed slide band seat. The sliding ring is tapered and fits flush against both the reelseat and the reel foot. The ring is thin enough to be flexible, but wide enough to provide long contact surfaces. The ring and reel foot are held against a flexible cork surface, not hard polished wood. The result is a reelseat that holds better than duct tape. Put the reel foot in the reelseat pocket, slide the ring over the other end, pinch the ring and snug it up the reel foot. The reel won't come off until you take it off. The design would adapt to all of the reels you show without issue. It's not eye catching pretty, but the design is beautifully functional.
Tom