I want the fabric to shrink up after quilting, it's the crinkly look I am after.
I've been lucky with bleeding, maybe - but if a piece concerns me, I'll do the water in a white bowl, wipe with a white cloth test. I've had one burgundy Moda that was a runner.
Have never found a slub after purchase; I have had a clerk remark while cutting that she didn't think it was right and pushed that aside and started over. My guess is that those end up cut to fat quarters.