Can you make an event which applies the province modifiers if they aren't present in the game?

Like adding them in an old savegame? If so, sure, I can try to make it works.

Thanks

Is it intentional that Rome and Pisa have no Center of Trade? (in Vanilla there is one as of 1.26 I think)

No, it isn't. Thanks. I'll take a look at it.

Is this still where you prefer suggestions, bug reports, etc. or just the comments section?

Also, is it possible to add an event that gives you a bonus when your borders encircle a wasteland? For example, gaining 5% fort defensiveness if you own the alps? Or are all wasteland provinces just classified as null?

引用自 Meatsmack：

Or are all wasteland provinces just classified as null?

As far as I know, the wastelands are null, yes. Maybe I'm wrong, idk.
But you can make an event which gives you bonuses if you own all the provinces surrounding a wasteland. In a nutshell, this is the classic: "give bonus IF own X province AND Y province", for example.