No to both ideas.
Quantum Armor its the best of the best and will NOT receive any kind of upgrade, in Al words if you want something better than quantum then go play in creative mode.
Cable rebalancing? What for? They are fine as it is, and yes we all frigging know fiberoptics are for information not energy, but heck this is minecraft so logic can be twisted to our taste (Otherwise steve could not carry 100x times his own weight on stone blocks and similar.)