No I wasn't trying to say that at all. If a module failed, they would replace that one module. If a battery back failed, they would replace the pack. We know the pack is very serviceable.Ford are warranting the battery pack for 8 years/100,000 miles ( I think) so what you are saying is that if the battery packs fails within that period then Ford wont be able to replace modules or whole pack. What do you expect them to do, give you a new car?
What I doubt they will ever do, is offer an officially supported upgraded pack down the line in some kind of aftermarket environment. I know the FFE had upgraded packs installed when it required replacement because they had to out of necessity (supplies) but I believe the differences weren't significant.
I just don't picture a day, where I go to the parts guy, and order a pack upgrade and have it installed.