I love my 28's but do agree unless they are scaled down to a true 28 frame size you end up with what is a underperforming 20 which weighs more than a 20 would weigh. Just like a 16 built on a 12 ga. frame is too heavy a 28 built on a 20 frame is as well. Worst are the 28 barrels put on a 12 frame. Fat boat paddles. Face it you could do it all with a 12 fa. if you wanted to. Perhaps a light British gun shooting 1 ounce or less loads, a 2" as your super light weight option and a waterfowler for heavy lifting. But where would the fun be in owning just three guns?
I do like the Ithaca 37 28 fa. which is built on a proper sized receiver. In fact my fat fingers and thumbs barely fit to load the gun and could never do it on a proper .410 size gun. Perhaps I could twist my pinkie to load it but no other way. If they built one I have to find out.