@MohamadJouni ,
I have recently completed a year of testing and evaluation of the BIM360 platform that AutoDesk own. The interoperabiity between CAD and GIS has taken a giant leap closer together with the developments in this platform, and ESRI's GeoBIM offering that also provides the missing link between CAD and GIS on the GIS side.
Principally, referrring to your question; BIM360 aggregates datasets, documents and collaboration tools in a Common Data Environment in the cloud. Civil3D acts as a Data Aggregator, and can connect ArcGIS Web services via the ArcGIS Connector plugin and reconciles/posts the data up to BIM360. So for that reason, it's very useful!
Secondly, with the growth of drone surveying, C3D provides a vital tool for digitising the survey. I wouldn't rely on GIS for this workflow.
David
..Maps with no limits..