Then there is the matter of the veranda railings. I prefer a lighter touch rather than massive timbers. I threw a quick drawing together to get a feel for slim wooden rails. These would be seen against a plain background of cladding plywood so would be far more obvious than this image suggests.
If I need 4x4 support posts for the veranda railings I could miter the bottoms where they fit inside the perimeter 2x8 joists. To get parallel faces for coach bolting the posts securely in place I needed to miter opposite faces. The image shows the general idea. Shame I wasted time fixing holed connector plates before I thought of this means of reinforcing the veranda's eight 'corner' joints. In the image above I have roughly drawn how the bolts might pass through the mitered section of a the 4x4. Naturally the coach bolts would be staggered above and below each other to avoid collisions.
I came close to collecting 16 x 8'x4' sheets of cladding plywood but was talked out of it. I have lots more to do before I need to cover the sides of the building. A roof [or dome] would be a very good idea to keep everything dry. Any work on veranda railings would improve safety but probably block easy access to the top of the building. A veranda floor would be a good idea though. To save working from ladders and provide the necessary working surface in the absence of scaffolding.