Fall 2013 is where I met my limit to how much I can do. Our campus move to D2L was anything but seamless, and the administrative decisions left the system outdated for what I needed. In frustration, I decided to take all of my classes and labs to my old LMS (Moodle Based). I made the decision late, and ended out building things all semester for 5 different classess affecting >350 students.
This semester is going better, but I reached the point where the changes burdened me and affected my instruction. Nothing was particullarly new (except how final grades were calculated), and individual components had been used before; the burden came from transferring and building the various activities.
Now I have the answer for people about when does flipping/hybridizing a class become too much.