Lots of talk about correction of roll-center, and specific line-item alignment specs.
When you understand the relationship of this dynamic alignment (alignment not just in static state but across the swing-arc of the full suspension in stroke, and in steering...), you will start to truly improve handling by finding directions, and ways to modify things accordingly. It is a complex science of geometry and physics, of loads and motion.
I'd also like to mention that with roll-center adjustment, you also need to start working on solutions for steering ackerman, toe links, upper arm re-positioning, caster corrections, and also making room to go for a deeper drop by hammering, cutting, and fabricating tunnels and making space to allow more tire clearance... Because the Black-i is that nice, and it will accommodate things quite well to these extreme drop-mod projects.
And each time you go further in correcting inherent chassis/body issues for a specific project, the more handling and precision you will gain back for such extremely lowered cars.