Well you can look at it like this:To be clear:
Mojang made all servers implement changes that would give all players an equal chance in game however they did not say how servers would have to change they just said they had to and set down do's & donts.
Cubecraft Made the changes, they had to make changes but they chose what they would change & how they would change them so saying its not cube crafts fault is not entirely true. CCG had to make changes but they didn't have to change it so that everyone had stone perms they could have given everyone Iron or Gold or Diamond or Lapiz or even Emerald perms but they didn't.
So stop saying its ALL Mojangs fault.
Everyone is stone- donators lose things, stones don't change
Everyone is diamond- donators keep things, stones get to be the same and don't have to pay $150 dollars worth of items.