I have the Single Ten, and 2 Single Six convertibles. The Single Ten is perfect. Its deadly accurate, beautiful, and built to heirloom quality. I really like the Fiber Optic sights, as its easy for my eyes to pick up the green much better than black. When you are plinking, the 4 extra rounds over a six shot just makes it a lot more fun. I dont see how Ruger "dropped the ball" in any way. You wont be able to appeal to everyone, and there are people who will hate just about anything different. If you go into shooting a Single Ten with an open mind, after about 3 cylinders full, you wont be saying Ruger dropped the ball.
I bought my Single Ten first, then decided I wanted a matched Single Six for WMR shooting. I love the SS with the Magnum cylinder. Its a completely different gun with the Magnum cylinder, as opposed to Long Rifle. I use it for long range groundhogs, and have splattered a bunch of them at distances easily over 50 yards with open sights. The WMR cartridge is a flat shooter, with alot more energy than Long Rifle. It even has some recoil, and a nice, satisfying fireball under low light conditions.
I then decided that I wanted a Single Action with a shorter barrel, and bought my 4 5/8" blued Single Six. I wish I would have known there was a Lipseys version in stainless, because I prefer stainless over blue, but my 4 5/8"SS is a beauty, as are the other two.
One thing to keep in mind with the convertibles, they will shoot to two different points of impact, so when sighting in, set your sights to one, or the other cartridge, and then find out where the other cartridge hits and use Kentucky Elevation. Both my convertibles hit the same, left to right with WMR and LR, its the elevation that's different, so I use the term Kentucky Elevation.