So, apart from the looks, why lower? Am I right to understand that a lower height means less transfer of weight to the outside wheels in a corner, thus a more evenly distributed weight to all wheels, equaling more grip? I would guess you have 1-2cms of difference from stock height ... and this provides a noticeable driving difference? or is it only that the 'limits' are increased?
And conversely, going up. Lets say I'm sick of hitting the end of my driveway and want an improved approach angle. Seems easily done with a coilover setup, what would one expect to notice going up say 3cms?
You pretty much nailed it. Definitely the looks. Lower centre of gravity reduces body roll and improves handling, spacers widen the stance further reducing weight transference and body roll. Lowered around 15-20mm, I don’t have a flat surface to remeasure on yet as my garage is full of underfloor insulation rolls awaiting me to install them.
Lifting will give better approach and departure angles but whereas lowering decreases things like body roll and centre of gravity, lifting will increase these noticeably. If it’s just for your driveway perhaps a steel plate to flatten the approach, or you could always try drifting in and out
I notified my insurance company of my suspension changes and all they wanted to know is that the car wasn’t lifted, I thought lowering would be more concern but apparently not, something to consider before lifting. You can also get suspension spacers which can provide a lift of up to 2 inches, a lot cheaper than changing the suspension unless you were looking to change it anyway.