I don't know if it is possible to add into the game, as I feel the movement tech and systems are pretty cemented, but if it is possible I would love to see wall-running be added to the game to round out the game's advanced movement mechanics. It could be variable based on player momentum, like if you're just sprinting you can get a normal wall-run for approximately 5 seconds, but if you're using momentum and you come out of a portal flying and jump into a wall you can wall-run at high speed for longer.