Not sure if anyone else has posted this ITT, but I'm gonna say the exact same thing I said in the Great Schism thread.
Grand strategy gamers want fundamentally different things from EUIV. Trying to get one's own preferred mechanics implemented in a single game mode is absolutely the wrong way to go about this debate, as that will lead to Paradox pandering to everyone and pleasing no one.
What we SHOULD do is respect others' playstyles and agitate for three separate game modes:
-A Historical Mode, where the ease of expansion fluctuates considerably based on the time and place, and in line with historical plausibility. So, for instance, in 1800 France or Austria can conquer and core Europe really fast (but massive coalitions will form really quickly for little AE), random international coalitions of natives don't form against GB (but attrition is much higher overseas until your tech/presence there increases), giant swathes of territory can be taken in 1700s colonial wars (but that massively increases colonial rebel chance), etc. etc. etc. It could allow for far greater fluctuations in power and a lot more risk to strong empires, but also greater opportunity for extremely skilled players (unless they're playing Ryukyu, Albania, etc., of course). This mode would generally be around 1.2 in terms of difficulty of expansion, with the historical part making certain aspects a lot easier and certain parts a lot harder.
-A Normal Mode, where expansion is somewhere between 1.13 and 1.2 in difficulty and speed. Perhaps keep the basic expansion mechanics constant in this mode for those who want a fairly consistent gameplay experience and less risk.
-An "Arcade"/Napoleon Mode, where expansion is easy for anyone who has the military and economic capabilities to carry it out. Make coring faster (or get rid of OE altogether!), make manpower replenish faster, etc., and have all these bonii apply to the AI as well, so the game presents a serious endgame challenge of massive blob wars.
This will provide an enjoyable gameplay experience for everyone. NOFUNALLOWED role-playing history nerds like me can play in Historical, players who want extremely rapid expansion and lots of fast-paced strategy can play in Arcade, and the rest of the playerbase can play in Normal.
I don't think this would be terribly difficult to program. There's no reason we can't all get what we want.