de jure drift is an interesting idea and it can be neat sometimes, but sometimes I just really don't want titles to drift in or out of my titles' de jure. I would really like it if you gave us a game rule that let us make de jure drift slower, disable natural drift (but still allow intentional drift via the Chancellor task), or disable de jure drift entirely.
It'd also be neat as a modder to be able to mess with de jure drift speed in-script with modifiers and what-not but that's a secondary point.