FYI, thread spawned various discussions internally on build stability and processes and we are taking very seriously.
On the engineering side we have some work cut out ranging from improved automation (prevention) to easier association of callstacks to user reports (debugging).
We are also talking about how we can ensure having good communication channels open so we are aware when you guys run into issues and can help. That to me is the most important aspect as we will never get things 100% right out of the box. The success metric to me is whether we can make it work for you together with you.
As a quick side note, we released 4.5.1 today – 4.5.1 Hotfix is Live! - Announcements - Epic Developer Community Forums!