My favorite part of the game is getting the seals. I don't know if you've done this one yet but there's one where you have to find the way to the top of the inside of a tower to get a seal and I actually felt queasy/disoriented from how far from the ground I was.
I don't know how far in I am but just like the first one the assassinations are starting to get a little repetitive and it's kind of easy to kill guards and conspirators. So far (I'm at the point right after the first time I went back to the real world to test my skills), you hardly have to stay out of sight because it's so easy to use the counter kill to get rid of a mob of guards. But at least there is enough to do in between them that you don't notice as much. But, after playing Arkham Asylum where you have to stay out of sight to stay alive it's a little disappointing how easy it is to take out 10-20 guards at a time.