I'm not sure that the tone of angry primary school director is suitable for this forum. Explaining me that I'm non mature ArchiCAD user... Sorry, man, I'm using ArchiCAD since version 5, and probably know this system better then you.
This is typical explanation about "responsibility" of engineers and "law" of people, who don't really have a clue what is BIM or Virtual Building and in which direction progress in this field is moving. The reason why I started to share my thoughts on ArchiTalk (that I know by ages, by the way) - is to share my experience and make a message that ArchiCAD today is incomplete, when, by another hand it has strong potential to take bigger market.
This is nonsense. This is exactly what good architectural practises are doing: they are delving in areas of construction. This is exactly how all big and iconic projects are built by Foster, Rodgers and Zaha Hadid. The main point of architecture is to design the building, and BUILD the building. To build the building it's necessary first at all to be sure, that it's buildable - means that shapes and materials are chosen correct. Also to supervise construction process - means to say and control how builders (contractor, sub-contractor) construct the building. Often famous architects are hiring another architectural practises, who are sitting on details, walking to construction site everyday - as it would be office. If builders are explaining to architect - how to build, that means architect do not have a clue what he is doing in his profession. All models and drawings, that delivered from architectural office - are legal documents and instruction how to build. Engineering project documentation also must be reviewed by architect and approved.
Architect must be centre of the project, the first person who is able to solve the problems on construction site.
It's absolutely obviously, that architectural BIM model must be centre of communication and contain all information. It's possible to imagine only structural part of the model, but impossible to have architectural model without structural part, as well as without MEP.