Nice looking lamp! It fits in with the room perfectly.
If I were to modify the shade I would suggest going with the same size for the top and bottom but a shorter height. The resulting angle of the sides would be shallower. If my memory is right the result would be similar to the "prairie" version Arts and Crafts.
Similar to this angle - maybe a little steeper...
Update: I just looked at some of your other shades. Yeah, like those🙂
