If they allow straight wall cartridges during muzzleloader season, you might as well just completely do away with muzzleloader season all together.
I could see adding a week or two of straight walled cartridge / ML only, but not adding straight walled cartridges to ML season. A repeating, modern, 45-70 would add an incredibly unfair advantage to muzzleloader hunters. Some of these newly developed straight walled cartridges have the ballistics characteristics of modern hunting cartridges.
I'm a big fan of muzzleloading hunting, and I really enjoy my few weeks of being in the woods with much less people galavanting around the woods making a ridiculous amount of noise.
I would like to see a primitive weapon season, cap lock and flint only, Even if it's just for a week or so.