I know this comment is a joke and all, but really as long as the bigger pizza isn't eaten in one sitting there really isn't an issue.

I know I've bought large pizzas with the full intention of eating the whole thing over a few days time.

For a weight deficient person without major health issues, pizza seems good. A single large meat pizza is tasty, has about 2-3Mcal and has fair amounts of both carbs and protein.

I just have to not eat it at once but protract the consumption for a whole day (and chew properly and have enough water), to keep stomach reasonably happy with the meal.