After consultation last week, we decided to subtly increase the radius of the edge of the chair and its curve according to its increasing height. 

Also, we experimented on a few organic forms of the joint.

Joints of different width

Trying out different curves at midpoint of joint

However, after many attempts of experimenting we feel that the joints look out of place when we look at it from a closer distance even though if it is looked from a distance it seems whole.