The question is how much they were. As the game does not aim to accurately model the real word, the difference should be taken from gameplay perspective.
I was wrong though, it is nerf indeed and Europe got richer only relatively. Used this data:
http://www.eu4wiki.com/List_of_Provinces.
Overall, by the new rules the world's total goods will be ~1023, if the wiki has accurate list of provinces and if they did not change number of provinces/their base taxes.
By the old rules it would be total goods of 1492.
For the continents (old/new/difference):