After removing and reattaching the muffler 4-5 times now to fix the kickstand mounting bolts, I have discovered just how unsuited it is for skid plate duty. My rubber mallet can dent the edges fairly easily, and I have no doubt that a rock or tree stump would easily dent it from below. If I planned on riding out in the woods any time soon, I would definitely want to add a skid plate, if not an entirely new muffler as well.
The underslung muffler is a really interesting design. It helps centralize and lower the center of gravity while also complying with the noise and emissions rules all manufacturers deal with. BUT in the aftermarket, there seem to be a lot of interesting options that are smaller, lighter, and much less cumbersome to remove, if needed. I'm wondering if there are any that would allow a skid plate to be fitted AND increase the clearance in doing so.