To give more context to what I was talking about with the thumbstick shape, funny enough there are two images right in the blog to show what I mean.
The high quality render shows what looks similar to "stock" Xbox One/Series sticks with a smaller concave top

while the lower quality render on the XIM Manager at the bottom shows the good kind of sticks more like the 360 with a wider, shallower concave top.

If we could get sticks that match the latter I would be very pleased!