With IN now having provinces joining the Holy Roman Empire be a province decision does membership also spread to surrounding provinces at random as in the past or the AI add provinces to the empire all that frequently? Playing as Austria who is the Holy Roman Emperor I vassalised Poland by annexing provinces until they were small enough to forcibly vassalise and then gave them back their provinces that I'd seized after adding them to the Empire. Now the only Polish province that isn't part of the Empire is the capital Krakow - which is surrounded by provinces that are - so will it eventually join and is there anything I can do apart from having them as a vassal, relations at 200, a military alliance, and reciprocal military access agreements to speed it up? Thanks.