Within sixty (60) days after the public hearing, the Commission shall review the preliminary development plan to determine if it is consistent with the intent of the Ordinance; whether the proposed development advances the general welfare of the community and neighborhood; and whether the benefits, combination of housing types and densities, and interrelationships with surrounding land uses justify the deviation from standard district regulations. The Commission's approval in principal of the preliminary development plan shall be necessary before an applicant may submit a final development plan. Approval in principal shall not be construed to endorse a precise location of uses, configuration of parcels, or engineering feasibility.