Brakes fade because the pads overheat or the fluid overheats.
The disc material can
also have an effect but it's less likely and not worth pursuing for the moment.
EBC Green Stuff pads are supposed to be a racing type pad.. so probably not to blame here. A cheaper or road-oriented pad might otherwise struggle.
If you haven't bled the brakes thoroughly enough then that is the obvious place to start. Any air in the system will expand as it gets hot and therefore causes more pedal issues.
Also, the fluid itself could be getting too hot and vapourising ("boliling") at the caliper end. The fix would be to use a high-temperature "racing" brake fluid since these boil at nearly 600C cf 300 for normal road fluid. Racing fluids need to be changed more often than normal fluid.. but Track car.. once a year job.
Put these 2 together and you get "Replace your fluid with a racing type fluid" and "bleed the system thoroughly".
Compensator... fix it... but it's probably not to blame. It's the amount of force in the front brakes that makes them hot, not the proportion of brake effort. If you fix the compensator you'll have a better balance which means you'll be able to lean on the brakes harder..
but for less time.. It'll be a better drive but the brakes still have to slow you down from 130 to 30 at the end of the straight.
The clutch... coulda been slipping because of contamination or a sticking slave cylinder etc. If it's working now, use it till it no longer does!