As promised - updated photos.
I'm working on digging out the berm I built up around the bog originally (2nd photo). I just don't have enough room in this area to use that space as I was. It's too hard to move around the pond with it there. I had it planted with chocolate chip ajugas which I absolutely loved, especially when they bloom. I will be putting a nice walkway around instead. Then I am planning to add a layer concrete to the cinder blocks vertically and carve them by hand to match the raised blocks I used on the pond section.
I still have decided on coping/capping since I don't like anything I have found. I want something formal yet natural-ish. I may make my own cap stones.