I don't really think that the number of provinces is actually the BIG issue, we are only... 40 or so provinces above vanillas number; many other mods go far above that without any great repercussions ( SWMH and WtWSMS come to mind ) because of it. The real problem is stuff like the (excessive) number of buildings, the events that go through all the characters and provinces with a low mtth ( Like the SELIN provincial flags, the Pagan trait modifier events, the Slavery maintenance stuff... ).
We should check which of these are really worthwhile to keep, which ones we can move to or modify into the less performance intensive parts of the game ( For example, getting rid of the SELIN province modifiers and just having the provincial troop values that are defined in 00_religions, the building cost reduction modifiers haven't been working correctly since forever ) and which ones we should remove entirely ( The vanilla "sins and virtues" already represent a set of personality traits that were and are desirable and despised by most societies, hubris is a bad personality trait nowadays as it was the same in Ancient Greece, so no need for the pagan trait modifiers, and as bearcatthegreat said, we can remove the character slavery stuff and just mark the enslaved characters as dead ).
But I'm not abandoning the project in any way; I'm not the kind of person that drops off things just because there isn't an easy solution to them.
We should check which of these are really worthwhile to keep, which ones we can move to or modify into the less performance intensive parts of the game ( For example, getting rid of the SELIN province modifiers and just having the provincial troop values that are defined in 00_religions, the building cost reduction modifiers haven't been working correctly since forever ) and which ones we should remove entirely ( The vanilla "sins and virtues" already represent a set of personality traits that were and are desirable and despised by most societies, hubris is a bad personality trait nowadays as it was the same in Ancient Greece, so no need for the pagan trait modifiers, and as bearcatthegreat said, we can remove the character slavery stuff and just mark the enslaved characters as dead ).
But I'm not abandoning the project in any way; I'm not the kind of person that drops off things just because there isn't an easy solution to them.