Depends which negatives you are talking about.
The Salvia is added because it blocks DGAT, which is what converts Diacyglycerols to TRIacylglycerols (which is the form which your body stores in fat cells). Adding an additional 500 mg will increase the effectiveness, but will also bring with it the typical cramping seen in TTA supps. As long as that is not an issue, it would be more potent, for sure.