Autodesk still has some issues with software that wasn't developed in-house not playing well with other software in the AEC Collection. For example, Revit has very poor site modeling tools. InfraWorks is (or should be) the preferred contextual site modeling package, but I cannot link an InfraWorks model into Revit without going through NavisWorks or some other conversion. I also cannot publish a LandXML file from Civil3D to get it into Revit without BIM 360.
FormIt could also be a better way to model families for Revit as it is a more fluid modeling environment, but there doesn't seem to be a good way to do this. And once the FormIt model gains a certain level of detail, it loses the ability to be converted into Revit walls, floors, roofs, etc.
Lastly, Autodesk is emphasizing cloud services, but these require an additional subscription. I think there would be wider adoption if the cloud services (BIM 360) were included in the AEC Collection.
Looking forward to this discussion.