I really like the look of the traditional Shaker step stool, but the top step is just too narrow for her to stand on safely and comfortably while she gets out and puts away dishes, at least in my opinion. I therefore widened the top step considerably, which doesn't look as good but meets our needs better. Since I was departing from the traditional design anyway, I also decided to move the dovetailed stretchers from the front of the steps to the back. No good reason, just thought I would like them that way.
While the dovetails aren't perfect, they represent a considerable improvement for me. Full disclosure: these didn't fit like this off the saw. I spent a fair amount of time paring.
My effort to improve has been very satisfying and has benefits that go well beyond dovetailing. By a process of trial and error, I found a sawing technique that works for me, based on this video. I saw across the end of the board to the depth of the teeth and then saw down the face at an angle before bringing the saw back to horizontal to finish the cut. I think this works because it is easier to see and maintain the correct orientation of the saw this way. I still have to constantly remind myself to keep a very loose grip on the saw, which makes a huge difference. Posture matters. I expect that eventually this will all mesh into a single smooth motion.
At this point, it's just practice. I am trying to get into the habit of sawing to the line on a scrap a dozen or so times each day I go into the shop. With a dovetail marker, it takes just a few minutes. For me at least, this is a whole lot more worthwhile than making a five minute dovetail.