Third the scope will be better protected from the various residue and debris from firing. On a standard caplock or in-line muzzleloader, scope tubes get wear and powder residue when the rifle fires. The forward mounted scope will avoid most this wear. At worst, a clear cap may be required to protect the rear lens. The other innovation is the three point Ching Sling.
Slings are difficult to permanently attach to a muzzle loader's forend.
That is because the ramrod gets in the way. Typically the sling attaches to a stud attached to the barrell itself. I never liked that because when the sling is used as a shooting sling, the pressure on the barrell affects point of impact. Currently I am working on two different mounting systems. I'll report back on the one I like best.