Me too love this plan, my dream was always to enjoy the first week without the pressure to lv and equip to start raiding as fast as we can.
What i didn't understand is the fact we are going to have 3 weeks of Mogu'shan Vaults heroic before next 2 normal instances open.
To go through Heart and Endless with some MV heroic gear make senses since the ilv of those normal tests was pretty high, but the ilv for all heroic testes was the same. So i sugest you get down a bit the dificulty of MV heroic or else people are going to hit their head in a brick all for 3 weeks.
I understand, you need them to gate it because you're forced into only doing one thing if not.