Whilst this is a simple construct and it might be OK for simple models; it effectively adds size to models every time versions are used in a module even if you don't want the variance. Also, in modules with 3 or more dimensions if you have calculation line items and aggregations the results may not always be give the expected result due to different calculation priorities. Finally, you cannot amend the summary method for a version formula within the versions setting
Questions on this topic? See 1.02-02 Do not use formulas in the version settings in our Planual forum.