I see your points Delmar. Personally, I dislike the process of hanging food which is why where I backpack, even if I'm not sleeping in a shelter, I still usually sleep near one to take advantage of the bear poles they usually have.
1.5 liters a day? Well, I'm pretty spartan with food in comparison. 64 oz of food space could last me almost a week. But I have unusual diet, eating habits, and consistently have trained my body to a low calorie diet. I should have factored in that difference with others though.
Yes hanging is much lighter, but I believe the oven bags are not directly for hanging but to cut down on odor, I would put it all in either silnylon or cuben.
Not being a gram counter myself, conveniency is an important factor for me. But I don't backpack anywhere where bears are not an issue, so I won't be testing this myself but will stick with the lazy hangs with bear poles.
Different plastics have different properties. Tritan is VERY strong and durable stuff. I don't think any rodent could get into it during hours of sleep, but I may be wrong.