I wrote something like review on the prequel, and there aren't many changes in this game, so let's touch only important things:
1) this game is just as good as previous, but more complicated
2) even more versitality in gameplay (now you can choose 2 of the 4 abilities from the start, all of them are good for different playstyles; you can level up Aisha and choose very handy skills, all of them are also good for different playstyles)
3) achievements! No, really, there are achievements. And they're pretty interesting. For example, "kill many people from distance" or "give a birth"
4) harder and longer game
5) there is a dragon in this game!
6) you can catch a dragon with a whale-catching net in this game!
7) luck check system (I like the smell of D&D in the morning)
8) slave ending is actually full of gameplay, it's not just a game over (but, again, in both games you start to like MC so slave ending is just a torture)
Overall opinion: totally worth it, brilliant game. 9 missing dried cheeses in virgin non-kill stealth run/10.
P. S.: No, seriously, I have a big problem. Trying to do a virgin stealth run without kills to unlock 2 (or 3, don't remember) achievements at once. But I can't find dried cheese to give it with vine to that sleeping guy who tell you about a key in toilet vases. I even chose "versitale" ability, but looks like it won't let me pass through this subquest. Maybe I can find this barking cheese in the assassin ruins, but in this case I won't be able to complete "stealth" achievement (because I can't hide from assassins without that magic hiding amulet, and to get it, I must find a key in the toilet vase).