You know, sideview ladders and sideview swimming seem requested often enough that you could consider making them built-in parts of the engine.
Those, possibly.
I did randomly add an attribute to the 'Magic Book' class, in the item editor, 'Fire Damage: [ value field ]'.
This allows the user to set how much damage fire made by the wand, with the magic book, does to enemies; and thus also allows upgrading the wand fire.