I hope Paradox will forget Iceland.
When I first launched this game, I looked at Iceland and the Norwegian islands and kind of snickered to myself thinking, "oh silly Paradox, those weren't that closely integrated into Norwegian society in 1444!" But the more I think about it? They were hardly independent, either. And remember that in 1444, Norwegians still spoke West Norse (although that was falling apart rapidly after the plague), making the cultural difference between Iceland, the Faroes, Shetland, and Orkney relatively small. EU4 doesn't really have a decent way to model the relative autonomy of islands, other than the new autonomy system — and it'd be needlessly harsh to just slap a minimum autonomy on all offshore provinces.
...Although I could get behind a minimum autonomy on all provinces not sharing a sea zone with your mainland.
edit: as for Kazan... They trade land leader shock for maneuver, and lose lowered attrition and maintenance in favour of a morale boost. Morale is strong, but land leader shock is stronger, especially for hordes, and with horde armies, the -20% maintenance is fantastic. I think Oirats are going to be the dominant AI horde in 1.8 still, purely because of their early game power by grace of Esen Taishi.
edit2: Isn't a migration cooldown idea relatively useless? That's an entire slot completely gone as soon as you get more than one province.
DD THE FIRST NAVAL MARCH IVE SEEN? 
