Well, you can always argue that one can memorize the location of spawn points, as well as spawn intervals. Also, I tend to not have trouble with items, especially dealing with people less skilled. For example, I was able to get first place, and Rafa-Son was able to get second place, at 2005's Anime Banzai, despite the fact that they were using crappy rules with items. But Smash Balls and Dragoon parts, I think, doesn't provide immediate advantage just by overlapping your character with the item, so they should at least be tested.
And that article was pretty insightful. But it's odd that YOU would post it, since you would ban stuff like Peach's Castle, but keep Cornelia and Onett, when they have similar problems. Isn't that a little hypocritical?