The antonyms for the word "more glutted" could be "less stuffed," "spare," "deficient," or "scarce." These words suggest a lack of excess or abundance, indicating a state of moderation or even scarcity. They are the opposite of "more glutted," which implies an excessive or overwhelming amount of something.
For example, a restaurant may offer customers a "less stuffed" menu option, which would be smaller portions or less heavy dishes. A minimalistic design aesthetic may be described as "spare" or lacking in excess ornamentation. A desert landscape may be described as "deficient" in water, while a rare and highly sought-after item may be "scarce" in the marketplace.