I realize you're not suggesting this, but it unnerves me that the way to deal with a weak link in a business is to commandeer that business and blow it out of the water. That's the whole "disruption" culture. All it shows is that a weak business can be destroyed, not that a strong one can be built up.

For a restaurant to work, those basic online things have to be coupled to the production and delivery subsystems. The whole machine has to work. This can only be tested by building a working restaurant.