At present when the builder throws up an error, its quite tricky without version control / change history to know exactly what could be causing the issue without working backwards in memory which is tough when you have had a busy day.

Is it possible to expand the error at build time to say exactly which layout or part of the project has caused the error beyond the example below

Don't worry, because as an admin, I have the details.

All errors you have, such as this one is logged and I can check it properly.
You even do not need anymore to tell to me because I recieve by mail all notifications of such errors.

For instance, this is now fixed already