It's not that less is more (see previous entry on list), it's that more is less, because as the limited animals we are we can take in only so much before it becomes meaningless -- and that refers to the length of stories as well as the breadth of the events therein, which is why at this point the epic, sweeping Star Wars saga is just a statistic.
This Column Has Drawings to Distract You From the Weak Writing
Often, the creation of the work itself is too epic. The fewer mediums you have going at once, the stronger each must be -- if all you're producing is literature, then, uh, you'd better not skimp on the writing. But the more you're combining, the weaker each can be, and, moreover, one starts to see them all as equally important -- The Writing equal to The Music and The Visuals and The Crotch Shots. But this is why The Writing is often The Worst: because it's the engine of the car and thus both disproportionately intricate and important, yet it's so often treated as equivalent to the paint and the sweet rims and the kickin' stereo and the other s**t that isn't in any way equivalent ...