The one about the turtle costume is just a misfeature, because Jens thinks that the story you tell users should match the code that implements it. It should say "costume."
Maybe we should add "stage" to the menu; we would certainly do that if we implemented multiple stages. So I'm going to count this as a misfeature too.
The only really hard one is the JS Function problem. I'm tempted to say we should replace the word "function" in the block title with a pulldown menu in which you could choose "reporter" (the default), "predicate," or "command." That would be going to a lot of trouble (because we'd have to keep that choice somewhere for every such JS procedure) to solve an esoteric problem, so it certainly won't be a priority.