Brake Improvements - Looking for thoughts

Nice car, by the way, 440 ?
You've certainly researched, and seem to have covered all the bases right down to braided hoses. Good job.
2 thoughts, no personal knowledge, slight chance, there was a pedal assembly with a different ratio pedal, doubt it.
The second is the pad composite, curious how the other pads feel.
As mentioned, you appear to have excellent equipment, and should have fine brakes.
If all is right, and as it should be, my next move would be more line pressure by smaller bore Master.
By rule, for imports - I am currently running 4 piston finned alum calipers, 1 1/2" ish pistons, and drum rears 3/4 whl/cyls.
I use an Ottosun (asian) 3/4" master cylinder mostly now.
One of our members posts mentioned going to an adapter to the 2 bolt master, that said he tried a 15/16 and smaller piston, perhaps he will pipe in, he's very active here.
In a previous life I built late-model stock cars and super modifieds with GM parts, and used a Corvette 3/4" 4 whl disc master on big single piston calipers, they worked well.
Volume of fluid really isn't an issue as the disc rotors merely relax, not really retracting more than a few thousands each piston.
AJ is really quick with math in his head, a smaller diameter piston by 1/16 is very small volume, and the travel isn't an issue either, unless untrue rotors knock the pistons back, then a quick pump may be required.
There also some members deep into expensive options that appear to have a lotta knowledge .
Good luck, I follow with interest .