I heartily second what Sedna said.
And it doesn't have to be long--in fact, if you look back at Yarnspinners I, you'll notice that the yarns tended to be a lot shorter (albeit twice as frequent). Take, for example, a randomly chosen turn deep in the game: (
Turn47). Certainly just as good as what we're spinning out now.
(Frankly, I could keep up a lot better if I split my yarns across a few turns. But I can't help myself...)