I was going on the assumption that the system is as engineered by Unique and Wilwood. But depending on use of the car, and personal factors, they may not be right for you.
As Mr. Fixit mentioned, smaller cylinders would reduce peddle effort at the expense of increased travel. Higher CF pads will reduce peddle effort but at no cost in travel. Although there could be other costs!
Check the balance bar. Have a pro bleed them and check the pressures at the calipers and go from there. Just my 2 bucks worth
Rick