1. Not much to say about this, i find the name to be fine.
2. Iron can handle both HV and EV because, quite honestly most people use only up to HV. Why? MFSU only outputs up to HV and the only reason EV its presented naturally its due to a high efficiency setting in a nuclear reactor.
3. Glass fiber its supposed to be the Best tier of cable (Hence why its expensive).
4-5. Not much to say to this either, see point 2-3.
7. There should not be any "Encoraging" of people to make them use the best tier of cable always, theres a cable specifically made for each situation. Copper its for wiring your regular machines (No OC), Gold its the update to that when using advanced machines that uses 128 eu and Reinforced Iron/Glass Fiber is supossed to be used for wiring nuclear reactors to MFSU and to transport high amounts of energy over large distances. If you always use the best tier of cable for wiring everything, you could cause accidents like forgetting to transform from hv to lv and destroying your machines if that happens, but if you use the lower tier of cables its the low tier cable itself who would explode, saving your machines most of the time.