Improved modelling, including building drainage so designs can be modelled to base of internal stacks within buildings to allow for greater collaboration between other design disciplines for general clash detection. Typically, Architects, Structural Engineers and MEP use REVIT to co-ordinate and collaborate. Currently not possible to do this with Flow due to lack of 3D modelling. More and more Clients are requesting this as well as the likes of including Uniclass / COBIE data input / output within our designs.