My summer quilt has Hobbs Wool batting. It is lightweight and lofty, breaths, is a wonderful batting to work with. I love Hobbs and dream wool batting the best.
as for the ( separating concern) on each batting package there is quilting distance recommendations. It is important to quilt your quilt at least as close as the package recommends to ensure your batting doesn’t separate when used/ laundered. So, if the package says up to 4” make sure you have quilting lines at least every 4” in all directions. More stitching is fine, less could be a problem