I read a post under Tech Support about making an option for "toggle crouch" to happen on "key press" rather than "key release". I've added "toggle crouch", which works like Thief, to my build. That is "toggle crouch" on key press. I've been playing that way since the end of March. It's not as simple as changing it to "toggle crouch" on key press, because ladders and ropes need to be carefully considered. I'd imagine there may be differing opinions about how to handle those scenarios.