The thing I don't like about Lilo in the L&S series is that... when she throws an orange and causes Gantu to trip, she stops being a little girl and starts being an action hero. What was appealing about Lilo was not her ability to reform people, heck, that was never her skill. It was her infallible GOODNESS that made other people (namely Stitch) want to be well-behaved, even though Lilo herself is not. She's a perfectly normal girl otherwise, though... and just because she can't beat up big alien bounty hunters doesn't make her any less strong, it just makes her all the more human.
This has been another random (very concise) rant, brought to you by Aldrius.