Renovation Project (Envelope Question)

The reviewer has asked us for the existing envelope conditions prior to retrofit to be modeled consistent with the requirements of ASHRAE 90.1-2007 Table G3.1.5(Baseline)(f) which says " For existing building envelopes, the baseline building design shall reflect existing conditions prior to any revisions that are part of the scope of work being evaluated." However, since the project before retrofit included more glazing area than the new proposed design, it is unclear if the baseline and the proposed glazing percentage can DIFFER. Please note the same Table G3.1.5 (Baseline) at the beginning, explicitly says" Equivalent dimensions shall be assumed for each exterior envelope component type as in the proposed design". If following this last statement, the breakdown of new, renovated and existing parts in both alternative becomes excruciating. Additionally if glazing in both alternatives is the same, will the new wall area replacing part of the glazing in the proposed project need to be compared to and Ashrae 90.1 envelope baseline value instead to the existing? Thanks