I think I see what you're talking about on the rounded bottom step. Or maybe I'm trying too hard. If you're facing the steps, then the bottom step on the left looks like the left edge of the tread turns BACK into the wall rather than continuing straight TO the wall like the others above it. Is that what you mean? If so, then from the photo, it looks very slight. From my build, I would think it is slight enough they can do the plaster such that it matches the steps above. I was surprised how much they evened out the different areas just with the plaster. You will need to be there and point it out to the plaster guys. And I mean right away! My plaster crew began like lightning and that pace continued for the entire plaster job. There were 20 or so guys (or it seemed like it), and they worked so fast like busy buzzing bees. I missed a couple of things because my mind had a hard time keeping pace with their work! Lol!!!
For the swimout and your dachshund..... My friend has a dachshund, and the height of the raised end of the swimout wouldn't be high enough to help her get out or keep her head above water until help comes. Have you measured it? And remember, getting out of the pool with any overhang of coping or whatever adds to the difficulty for a little dog to get out. Maybe your dog is larger than my friend's. Also, from the pictures, I would be concerned about my dog swimming all the way around and finding the raised step. I know when my granddog was here, he first got confused when swimming around the curved part of the spa and would turn around when he didn't need to. (now he's my granddog, so don't tell me he's not too smart! Lol!!) You might want to go ahead and consider some ramps. Your dog might not happen to fall in near the stepout. Amazon has some, but there are also YouTube videos showing how to make your own which I think look better and for less money than the ready-made ones. Just my .02 worth.... Before my granddog came to visit, I read somewhere that many animals can swim with no problem, but it's the getting out that's the trouble. They can get exhausted before they find the way out. I had never thought of that or how hard the edge of the pool is for them to reach and pull themselves up and out.
I guess real life testing of the size of the bench is now necessary. We'll need the results, of course!!!
It's looking great!
Suz.