I think that the wheel died of bearing too much weight more than anything else
Basic engineering tells us that what makes a spoke break is usually not tension but fatigue, and fatigue
is always a function of the ratio between the max and min load:
-Minimum load occurs when the spoke points toward the road
-Maximum load occurs when the spoke points upward.
-When the spokes are too loose, their minimum load is zero, and the max/min ratio is huge.
-When the spokes are properly tensioned, the min load is not much different from the max load, and the ratio is closer to 1.
Now, the question is: does a 2 cross lacing allows a higher tension than a radial lacing? I tend to say yes, but I'm not sure. The limit on radial lacing is the hub flange resistance. Based on this argument, a 2 or 3 cross lacing should allows for a higher spoke tension before hub failure becomes an issue.
I hope I have not introduced too much confusion!