Probably not possible in this build of the game but I have a few ideas to make things a bit more "tacticool":

Flip up 2x sights for scopes - I like the 2x sights but being able to 'turn them off and on' would be decent.

Tactical doors - So I found if you stand infront of a door and open it whilst blocking it, you can half open it. If this was a feature where you could choose how far the door was open then it opens up tactics, like flash and clear or peaking a room.

Doubt there's are possible now but here are my ideas.
Really enjoying the game, can't wait for the full release guys!