Shimano and avid sorted boiling brakes years ago with two very different braking fluid. Magura to have it sorted from word go.
Ahem. You could boil HS33s.
It was a demo bike, so you’d like to think there was some thought in the choice of components.
It was his (poor) choice.
You don’t put moped brakes onto a sportsbike – that’s effectively what he did.
If you want thinner depth rotors you need to increase the diameter (see Buell). Small diameter rotors are wrong for lots of reasons such as frame loading, torque required to provide a given decelleration, heat dissipation.