1.3.2: Empire maintenance and mid-game economy nerf?

[Dhamon]

Were empire maintenance penalty increased in the recent patch?

I played a campaign with Sparta, and after conquering Italy, and after taking a few more provinces in the balkans I went from an income of 10000 to 1000 without adding any new army.
I've now conquered Cartage, and the economy is still not getting up, with about ~2000 income. I am forced to sack and loot cities if I want to build higher tier buildings.

I don't know what has changed, and I appreciate trying to curb the "economy snowball effect" in the mid-game, but in this way it is not sustainable.
Also considering that most higher tier building require 10k+ to build, so that's going to absorb the economy surplus significantly

[Dresden]

No empire maintenance changes were implemented.