I was thinking that they should keep expanding on what 47 can actually do physically. For example, peeking around corners, using human shields, and hanging people by fibre wire from up top in elevator shafts. Some things that I would personally like to see:
47 could pull people around corners to strangle/snuff them: If 47 was pressed against the wall at a corner or doorway he could pull a bystander aside to snuff them silently and out of sight with fibre wire.
crawling underneath doors: You know in those cat videos on the internet where a cat squeezes through a seemingly impossiblly small space underneath the door? What if 47 could do this too. This would give us more strategies for getting around closed or locked doors.
What if 47 could contort into different shapes? Like if he could contort into the shape of a chair and unsuspecting targets would sit on him? He could contort into various objects and blend in with the environment.
47 could hide up above in small rooms and narrow enough hallways by pressing his arms and legs against opposing walls to keep his body hoisted up and out of site (not sure what this is called, sorry for poor description. You see this often in movies with ninjas and stuff, ex: in the matrix where they are hiding in the chimney by holding their bodies up against the surrounding walls)
Let me know what you guys would like to see.