Low height to get soft springs and dampers work together, minimal changes on dynamic camber, maximising contact area of tires all time. Soft rear to keep tire contact tarmac during weight transfer.
Idea was put car full balanced on springs and then add just enough to keep body roll identical (plus minus needed softness).
No need for rake, because low camber front and medium rear with softer rear springs. If I put tighter springs rear then rake can be used, and front needs more camber and toe after that. So low powered car at this type of tune works, or I like it

My quick calculations about spring stiffness is taking care of braking and acceleration dive/squat, it should carry weight+dive/squat easily. Data logger will tell did I count it right.
Had to check what data logger says, haven't check, car feels fine under, but just curiosity gotta check how data shows it.