Tech #1 - Retaining Inputs

So I found that if you Enable "Hold Toggle" in the Gameplay Settings. You can retain the E input to make transition doors work faster. You tap E on a corpse/container and look away before the dial complete. You then head to where you want to use it. This works 100% of the time

Tech #2 - Kill Animation Skips

So I discovered that you can kill someone by "walking into them" while hitting C. I managed to do this to Molly the Trader regularly but jumping over the small wall and spinning and hitting C. I believe its because the Animation of landing hasn't finished so it skips her execution animation.