Directions that make sense. If you can't write a sentence that makes sense, find a proofreader. Don't over complicate the design just for the sake of making it complicated. I have one pattern that has you make a jillion strip sets, cut them into blocks and then sew them back together exactly the same as if they weren't cut. The corner blocks for that pattern had a whole bunch of unnecessary pieces too. I ended up redrafting the whole pattern.