Real Estate definitely falls short in EU2, for two reasons. Well for one, you cannot collect MP From the New World Colonies. Making Trading Empires Purely Naval, Technological bandits. They'll wait for their Key Leader strike Massively with reserves and pray that win an outstanding victory. Nations like Russia, France, even OE or Austria played right cannot be beaten by a Naval Power on European Soil only Ally themselves and use their Money instead. We've played many games where we use weaker trade, I've had difficulties with these games, being so use to Trading the Hell out of the World and Taxes was not important past Trade 5. I could trade land for more Trading and I Recruit Mercs 10Xs over the MP I lost. Though there are a few weakling nations that require extra CCs...
The problem is you do not have enough income, it's quite difficult to produce certian things, like new Forts<that are very expensive> something Europeans didn't have a trouble doing. Many other goodies as well, such Manus, newer Technologies, and Ships... We need to cheapen the cost of certian items, lower the value of Trade<do not wipe out altogether> though make it say 1/3rd the income of max of any Nation. Also somehow pay off better Trading Posts, Pay off better LandOwners... Real Estate is the key to success and to trading. Warped in EU2, you just have to trade in those regions useless resources noone really wants anyways. Just have the tech, and the right Sliders... The Trade Value of Certian Real Estate should be increased, thus making it profitable to fully Colonize. I'd make them Mega-profiteable to colonize. It's painful and costly to colonize and New Games of Eu2 have done away with the Colonial aspect of the game, to more trading and possessing Key points. Yes control the gold early and then later screw that, just hold the Key Provinces of strategic value and CoTs... You need nothing else to win...
There are so many aspects to be tweaked in these departments
as far as these worthless treaties, NonAggression Pacts, these land trades... They're not all bad, there should be a game limit on them So many deals allowed per session per pair of players, that's that<also nothing that is a conflict of interest>. FRIENDS, should be smelt out. How would you feel if you're playing Poker with Freddie, Johnny, Scottie. and you know Fred and John are Pals and keep winking at one another when they got an Ace? You'd feel like this collusion and you're losing your cash to them!? You'd be pist, why not also in EU2? Many are set buddies comming from other games, set alliances and they'll never change. Friends should be sniffed out and placed at the odd ends of the map... Also penalized for any sort of special deals they may conduct outside of the normal realm. I am not guilt free of this, I'll definitely give favoritism though ask Dave

One Minute I'll be your buddy, the next I'll stab you in the back... You have to do this! Otherwise you're not living up to the real feel of History.
To add some of my other thoughts, these constant reloads, these constant unfair rulings...Hell with that, in the old days we sacrificed Fair for Speed, something that isn't done anymore. Now all people care about is well, do I get this, and do I get that edit? Oh, my inflation is too high. Whiney little children, if everyone accepted their fates as they have created them we'd all come out about equal with the random factors of the game. Plus with the bugs as well. You endure them, 1 century someone might lose a Top Notch leader the next another might, deceased before their time but hell, that's life and it happened in real life as well.
Just saying that too many players have become overly picky and overly sedate in this game and it leads to boredom. It's alright to be a little bit friendly, and a little bit gamey but there is such a thing is too much.