I just got the game last week (I've had other Paradox games) and I love it. I'm sure my concerns have been mentioned elsewhere, but I'll just add a few things I noticed about playability after about 20 hours of play. Oh, and I play with the official 1.03 patch, non-beta, whatever is on this site.
I want there to be a message when enemy troops land or begin to siege one of my provinces. I get messages for revolts, but sometimes there are troops in my territory and I don't know until they conquer the province!
There should be a confirmation window when you dismiss a general. I was playing as the USA and with my hard earned leadership points I got William Sherman. I was holding the mouse over him to look at his bonuses, and ready to assign him to a corps, and all of a sudden he disappeared forever! That little X for dismiss is too easy to click on accident. A window should come up and say "are you sure..."
I would like it be easier to add and remove specific POPs to the factories. If my factory has ten slots and I want to remove a minority culture from the list cos I have primary culture craftsmen, I haven't figured out if or how it can be done effectively. If the Cherokee or Cree craftsman is right in the middle of the list and I want the unemployed Yankee to do it, I think I should have better control. Perhaps the screen that has POP information and whether you want to educate them etc. could also have a "dismiss" option so I can clear that factory slot!
Just a few things, Maybe they are addressed elsewhere in the forum. I love the game, though. I can't believe I waited so long to get it.