We need a better way to look at (the features of) the world than Folk Ontology.
Any alternative ontology should be ==more parsimonious==, i.e. postulate fewer entities. This reduces the cognitive cost of using it and makes it more universal, i.e. cover a wider range of phenomena more adequately.In the language of Bayesian epistemology: We want prior beliefs that generate as many (true, correct, useful) posterior beliefs as possible, i.e. that are as broad as possible or have the highest possible informational entropy. A parsimonious ontology drives the overall parsimoniousness and hence generality of our belief system, i.e. our Models.
If this deflationary character of the ontology is combined with a greater openness for diverse descriptions of reality, the ontology also becomes ==more productive==, i.e. allows us to generate more Insights.
Thus a better ontology should be more parsimonious and productive.