Proportionally, however, the EU4 core system is a huge step up from EU3 where you can feasibly get to a point where you burn 2+ infamy per year, meaning 100 new core provinces every 50 years with good CBs, and there's no realistic cap at all on expansion other than infamy burn. Hopefully the new overextension mechanic plus the necessity to spend admin points on stuff other than cores will mean that even large states grow only at a slow (i.e. historically appropriate) pace.
Having read Guillaume HJ's post in the 50 Points to Core thread, I'm actually fairly appeased. Though we shall have to see how it turns out.