I've had to learn cantilever geometry lately. Some of it does seem like an art. So your thread title caught my eye.

I notice you have a very low yoke angle, giving high mechanical advantage but at the cost of longer pull needed. With the levers I have, I can't go that low on the straddle cable.

In the bottom photo, it's hard to tell but is there negative toe-in? Probably a lens issue.

I've thought about switching to shorty linear pulls (I have road brifters), but I learned I couldn't gain any (theoretical) advantage. Realizing that made me learn how to fine-tune the cantis.

I believe it is easier to set up linear pulls correctly, without having a solid background in geometry and physics.