To give you an idea about the GB values in the new setup: a certain Great Building that on level 70 in the current system provides you with 403.625.386.158 points (as you can see - and as you have pointed out on multiple occasions - this was really throwing the ranking off balance) will now be worth reasonable 1.104.660 points. While the details can still change (exact values of Forge Points and goods), so the final value can be a bit higher or a bit lower, the general rule will remain.
Below you can see a detailed explanation of each factor.
:No Age (the only No Age building is Observatory) - 100:Multi Age (for example Champion's Retreat) - adopts value of the age factor of the era they are currently in.:All Age (for example Victory Tower or Wishing Well) - 20