Basically, holding down the use button on a follower (like you would on an item if you wanted to move it around, not pick it up into your inventory) brings up the 'I want you to do something' feature. Only, it also works from a distance. I've tested it out and it works pretty well for steering followers around traps.
Simply tell your follower to wait, move around the trap, and then sight your follower in your crosshairs, and hold down the use button. Then you can use the 'Wait here' a few times to maneuver them around a trap. Or into one, if you want

Hope that's helpful for some people

EDIT: Forgot to add, when you do this, your follower often starts moving towards you right away, but you can pretty much instantly tell them to wait right near where they were standing. I don't think it always did it, so maybe a recent patch changed it?
EDIT2: Also, they wont sneak in this mode, even if you're sneaking. Still playing around with it a bit.