They've talked about this before actually. Here's an example scenario:
- Your mission is to find a guy in the city that needs to be assassinated.
- To find out where he is, you tail a person who is going to meet up with him.
- The guy notices you. This is normally where you desynchronize in previous games, but instead he runs and it becomes like a chase mission.
- When you catch him you end up killing him but by looting his body you find a map that has the meet up location so now you know where they guy is.
The obvious concern there would be "Why don't I just kill him from the get go if I can get the info that way?" and the answer is that there will be consequences for killing the guy. So since the guy was killed, word gets back to your target who now knows you're coming and beefs up security and the fight becomes much harder. Or that might also happen if he gets away during the chase. I'm curious to see if they'll actually be able to balance out that kind of stuff. I imagine the way you spec Arno might be a way to influence which way you might approach those opportunities.