W&N has a scrim so it is quite durable. If you are tearing W&N or pulling it out of shape with the larger sizes you need to have a gentler hand with it. Taking the batting out of the package (or off the roll if that is how you buy it) and spreading it out to "rest" overnight helps a lot. For a higher loft batting you need to switch over to a poly or wool. I like Dream products and Hobbs products. Hobbs polydown is a lower loft poly but still very nice. Quilters Dream Puff is a higher loft.
Allow your batting to rest and put it on the rack gently smoothing out any wrinkles that may remain after a 24 hour rest. Remember cotton tends to have a lot more "memory" than poly so the wrinkles and fold marks will remain visible but as long as it is smoothed out you won't have any lumps and bumps once quilted. Do not pull and tug at the batting, it will tear when handled roughly and some are much more fragile than others. The two I mentioned are very durable in my experience.