Good idea, mediocre execution. I guess it's "okay" for the prize and adds some decent foundation to build more stuff upon (I think that colony / protectorate stuff can make an awesome feature for Vicky III). But there could have been more - better and more New World options, more events & interactions with vassals, colonies and protectorates, stuff like that... As for vasall feeding: I never used it and still dominated the game - and I am not even a warmonger. I think the game is still a cakewalk if you stick to a reasonable pace, but I guess many people think that you should be able to conquer europe within 100 years... ...my bigger gripe with the "empire building" is that there is not much stuff to build. EU4 is a pretty shallow wargame once you have understood how that stuff works. No internal politics that would make the game more interesting (like in EU: Rome, Vicky II, CK2 or Magna Mundi for EU3), no real economy (like in Vicky II) and really not much strategic depth. Imho its a pretty bad sign that the much more RP-focused CK2 has a vastly superior combat system with several unit types, more detailed impact of leaders. Not that the CK2 system is perfet (it still has so much potential for improvement), but it is a lot better than the simple "carryover" from EU3. :/ So, yeah, some interesting new features, but the core of the game is still flawed for my taste.