1. I want the ai to be a danger. If it cant be fixed up to be intelligent I would buy a AI focused DLC to make it so.
AI improvements fall into HARD diminishing returns from a cost standpoint and start running afoul of basic game performance; functionally you'd add potentially hours of slowed time to get a comparatively modest AI improvement that you can still walk over. Everyone wants good AI, but there's a true constraint here not unique to EU IV.
2. I want MP buildings to be slightly higher benefit to cost ratio.
The problem with this is that they're already better than most think they are. Right now, tech > ideas > buildings. However, buildings aren't *much* worse. You can easily raise manpower by well over 100k in Africa with buildings alone for example, or drastically improve your income.
Considering they require no commitment prior to building them unlike ideas, they should be weaker. If you make them significantly stronger than now, you throw balance in a bad way.
4. I'd like almost every religion (eastern asia and indian particularly) to get some kind of overhaul. Im happy about the indian religious changes proposed.
Me too, but I'd settle for anything aside from heretic tolerance so that Eastern are not actively penalized...or simply making heretic tolerance less bad.
5. The tech penalty for western countries is way too high. Maybe a 5% reduction on non western tech penalties? Or a slight buff to the troops of non western countries
They really just need to pull monarch point penalties and let other tech groups get better units at 26/29/30.
6. Ai needs to stop obsessing on naval and quantity ideas. Quantity needs to be buffed up a bit. Combat width and/or attrition reduction comes to mind.
They've confirmed a quantity buff AFAIK. Also, AI ideas are pure scripted, so it's not a hard change. That said, naval is quite good even if the AI doesn't use it to its potential.
9. More ai loyalty to countries that help them...maybe Ai should be aware of which countries won how many battles against its foes. Some players complain that they save a country, just to get rivaled by them right afterwards.
They're re-doing the rival system, hopefully that stops crap like Makassar rivaling Tuscany (that is only in Italy), Fox rivaling Malaya, or Assam breaking their only alliance to rival MK despite the latter having 500 regiments to their 20.
10. Dont scale event costs based on yearly income, have a hard limit at some point. Also, more events!
Too many events are strategically void. If they're going to add more, we need to avoid adding more of such events.