Hi @unsichtbarre ,
My guess is that the majority of people will never need this package, so there is no reason to create dependencies, or install it by default. Otherwise, it will be part of initramfs management on all installs.
This package is necessary to prevent race condition issues at boot; what could happen without it is that VGs get trapped ahead of multipath by the operating system. If you dont have any entries in fstab for your iscsi mounts you dont need it.
edit- to clarify, if you're not issuing iscsi discovery AT BOOT you dont need this package.