I am not holding my breath for any drastic improvements to the structural connections issues since the quote below about the mitered beams got working with the connections is a direct quote from an Autodesk Support person;
"According to the developers, this issue is a known limitation in Revit. The miter command uses a reference plane to cut the beams in structural elements, and when fabrication element is created (as happens when a detailed connection is placed on the beam), the (original) structural element is ignored by Revit. We will be updating the documentation to include this information so users will be informed about it. At this time there are no plans to fix the problem as a fix may have an unknown negative impact in other ways, and/or would require a major code revision. I wish I had better news for you, but I thought you'd want to know where things stand with this issue. Let me know if you have any questions."