I took a look at my 2014 with 3000 miles today. No visible cracks yet. The upper tube with the welded brace, while not fully triangulated, certainly appears robust. It also has the diagonal C shape member (the one supporting the steering rack) which goes from the front of the upper frame tube diagonally down to the rear of the lower frame tube. Thus the upper frame tube is braced horizontally and vertically. Hopefully Morgan also switched to a heavier wall tube when they became aware of the issue. Not sure about the forces on the lower frame tube, it supports the motor and the motor torque pulses, as well as the suspension loads.
