What was resonance?
What made resonance between expert pilots and expert mechs special?
What allowed expert mechs to exert greater power when they resonated?
Ves couldn't answer these questions right now. As a Journeyman, he invested most of his energies into becoming better at designing standard mechs, particularly medium humanoid mechs. His expertise in other areas of mech design was sorely lacking.
It would have been great if someone actually explained the working principles of an expert mech. Sadly, neither the prim and proper Master Willix or the former desperado known as the Skull Architect was willing to share any details.
Only Senior Mech Designers and higher were qualified to learn the secrets behind expert mechs. There was no exception to this rule as far as the mech industry was concerned.