It is true, the only advantage is that references, and tolerances created in the drw do not see them in the modeling phase, and in some cases can disturb not little.i... ps: in any case, if you use "model reference" in the drw, the plan, or the axis, creates it in the 3d, and what you see is nothing but a call, as you said!!
matching everything with special macros. I guess.... because you can create them with rules, and the "game" becomes very powerful... .