Help: Stuck On a Design

Photo 1: I have finally started laying out the shelves in my recently renovated, contemporary art nouveau/art deco-style office. Please ignore the bottom shelf as those are items that need to either be packed away or relocated elsewhere in the house. Also, ignore the agate bookends as they are only there until a vintage set of bookends arrives. I also have another case of vintage hardcover books waiting to be unpacked. The two empty frames on the shelf will shortly be made into padded velvet jewelry displays to house a couple of antique brooches. None of the placement is set in stone. There is a second bookself that matches this built-in. The bookcases lie on either side of the double office doors.

Photo 2: I went with a bold, blue, art nouveau paper (the color is much richer in person). I paint-matched the wallpaper and used it on the pre-existing bookcases, lower wood paneling, and moulding. I covered the back of the bookcases in a gold-tone grasscloth, which has gold metallic pieces sporadically interwoven. With all of that, here is my question:

Photo 3. I have no idea why I am stuck on this, but decided to ask for opinions as I've hit a mental roadblock and can't seem to move on until I make a decision. I am considering putting up gold corner brackets on either side of the top shelves. They are relatively small corners so it took me awhile to locate a bracket in the style I wanted with dimensions that would work. What do you think? Add the brackets or keep the corners plain?