Hi, upstream maintainer here. I saw that this was moved from package 'squashfs-tools-ng' to the package 'squashfs-tools'.
Both packages have a few features that the other doesn't have and the tooling in squashfs-tools-ng is *by intention* completely different than the one in squashfs-tools. So I would not recommend it as a direct replacement. The tools in squashfs-tools-ng have also been carefully named to not collide with tools from squashfs-tools, so that the two packages can be installed on the same system side-by-side without interfering. In short, if people want it, I would also recommend adding it as a new, different package. Greetings, David