when importing objects it would be super if we could set generall material parameters… its a pain in the ar** if one has to redo all material settings when updating from local… 
normally i want textures only with diffuse infomation and all other pbr material settings at non shiny, non norma, non nothing… … if properties are set one hast to come in there and tune anyway… but as a start a clean diffuse model would be better IMHO