In Trine 2, when you host a game, you have options for Player Levitation:
With it Off, it means that a player can't jump on an item (eg. a conjured box) and then be levitated by Amadeus. With that consideration in mind, it seems like turning this option on would make puzzles considerably easier.
Me and my friend played through with this option off, making use of mid-air boxes that he would quickly hop onto and jump off of in order to grab difficult-to-reach experience items. We did so with the notion that levitation would make it too easy (we used the same logic for choosing Classic over Unlimited).
However, every public game I've played has had Player Levitation turned on to Friend. This made things considerably easier when, for example, a player's foot was barely on an object that I wanted to lift. It also allowed us to grab experience orbs that I didn't even know existed.
Were we just making it too hard on ourselves?