I think it could be with more assessment through the use of global gravity anomalies for the same area

Any interpretation of Bouguer gravity data should be built upon a realistic model with reasonable density values. Gravity data is non-unique so multiple hypotheses are possible. The best hypotheses are built from density data from boreholes. If an idea cannot be modeled due to lack of density data, any publication should also discuss alternative ideas. Such a paper might be valuable to generate discussion. If data exists and the idea cannot be modeled, it should be rejected and then other ideas should be modeled.