It's nice to have a bag for your drysuit, but they are not as delicate as all that. You certainly can puncture them with contact with sharp or abrasive objects. All drysuits eventually develop small leaks, which you find and fix.
I have never noticed any odor from the inside of my drysuit. I do very occasionally turn it inside out and wash the inside, but that's just to make it easier to get in and out of. Otherwise, the suit gets rinsed with fresh water, and the inlet and dump valves get carefully rinsed. At intervals, I soak the dump valve in fresh water overnight. The zipper gets carefully rinsed, and gets lubricated with wax (hopefully before each dive, although I'm not that diligent). As the placket frays, I burn off the frays carefully with a small torch.
They are a bit more fragile and finicky than a wetsuit. But it's worth it.