Okay nice wall of text but all I am proposing is changed level restrictions, gold prices, heirloom removal, and experience amounts. Not that hard to implement.
It would take time and money away from producing the actual game. There is far too little interest in what you're purposing to actually take away from production to make it.
Also, the Wall of No may not fit perfectly, but it's the same ideal. Blizzard has said no countless times. Stop asking.