Jeff, if you post a pic it will help generate suggestions. We had a three season room built and did sheetrock on the walls and a plaster cathedral ceiling.

As well, I would continue with the same pavers that you are already using. (I am a fan of the contrasting color edge. Maybe you will consider incorporating it into the patio and maybe later, into the walk.) As shown in the rendering, the wall color seems quite nice as compatible relief to the brick wall color of the house. I think they work very well together. However, I don't like the thin, dark cap on the wall, thinking it looks cheap (thin) and a bit schemey (dark, like it's trying to be an exact match to the brick, which seems like an unimportant goal to me.) A nice stone wall with a cap made of the same material (but thick ... 3 1/2" min.) would look a lot richer in the end. A cap which overhangs the wall face by an inch will create a substantial shadow, which will set it off from the wall. These shadows are generally underestimated in their importance and make a big difference in the finished appearance. For my taste, the gateway opening looks a bit tight, relative to overall size of house. I'd add a couple feet of width to it. It might help to keep in mind what is a main feature and what is a detail. Figure out main features first and details after. (For example, pick the wall color without knowing anything about its cap.)

I'd do SW's Alabaster on the trim to replace the teal color. Very pretty house!

It's considered good luck to paint your porch ceiling haint blue. https://www.houzz.com/photos/1718-pierce