I think you are either misunderstanding or using the wrong words.
You absorb only sugar in the stomach - and the VSG sleeve is the same as the DS. Any sugar that is not absorbed in the stomach will be 100% absorbed shortly thereafter - without any revision to your small intestine, you will absorb ALL nutrients you eat naturally. With a sleeve, you will still have to be dieting for the rest of your life - have no misunderstanding about that. It may be easier for you, for a while, until the stomach stretches out, but you will have to be strict with watching your carbs and calories just like before. There is NO malabsorption with the sleeve.