Follow the money
Spline,
Even just looking at the helicopter divisions, based on sales of Blackhawks, Apaches, and Chinooks Sikorsky and Boeing dwarf Bell. There is no financial reasons the Defiant should be late.
Unless Sikorsky and Boeing just want to delay any JMR follow on contact as long as possible. Or even kill it if possible. That way they can continue to sell the Army Blackhawks and Apaches as long as possible.
Regardless if it is technical or a financially tactical delay, I believe the numeric for the SB >1 should be changed to SB<Bell.