The assassination challenges should be way more vague, even hidden. When I look at them, I think, "Oh, cool, I didn't know you could push one of the targets off a balcony so she then lands on top the other," and I'm impressed that these kinds of things are in the game but if the game made me work to find these out on my own, using mysterious, hidden challenges as a nudge, they'd be so much more fun to complete. At the moment these assassination challenges feel like a check list, not like discovery. I've never dropped the lights and I'm not going to just because a check list blatantly wants me to, but if these were hidden assassination challenges well maybe I'd try dropping the lights just in order to see if that was one of them. Treat these as secrets, devs!
The devs at least seem to understand that the "be careful what you wish for" challenge is so much cooler when vague. It'd be stupid if it wasn't vague. Make more of them vague. People can always go to a walkthroughh for the "check-list," version.
Either way I'm NOT going to read any of the assassination challenges from now on because it's funner to try and complete them without even knowing what they are.
It seems kinda obvious that every level will have a hidden "Novelty" disguise (ala "Vampire Outfit") that will be tied to a ton of "feat" challenges, so if I come across one of those then I'll know to play around in it.