After a few days of playing this, I am officially bored.
The thing that bugs me most is that the battle maps are all hills and pointy things that the camera doesn't like navigating. I like that it makes the battles more complex, but I'd rather have more open maps that don't have stuff getting in the way all the time so I can see without moving the camera around the whole time.
The RPG element is a bit strong for my taste, with construction of buildings in each province, then assigning provinces to appropriate heroes, then forging new artifacts and distributing them, all taking up more playtime than the battles (which for me are the fun bit).
Also, the voice acting is abysmal. The artwork is all badass for the character who is supposed to be speaking, and this completely incongruous pansy voice comes out, or something equally inappropriate. Not a huge issue, but while you plow through diplomacy/artifact quests you have to listen to them drone on in their heavily period-based accents.
I preferred the first one, although at least this is less buggy, looks better, and has better units/balance. I just feel the SP is incredibly dry. If you like spending 15 mins working out which ring/amulet/armour you want to put on your hero every time you get something new, it's for you.