No.

No. It would work better in a living room.

No. It looks like it's been crammed into a too-tight space.

I think the color looks a little harsh for the space, where a wood finish might work better, or a creamier white. I think you could make the size (pull it out from the wall an inch or two) and shape work with the right accessories, but think you could do better in your pretty room!

Bookcases in a dining room always look odd to me. I don't have a rational explanation as to why, they just do.