Good find!
At least they seem to have now moved closer to the painful realization of some of the real goals:
Most critical to the future is investment in technologies focused on operability that would dramatically alter launch vehicle design approaches and yield fully reusable, low-cost, highly operable space-access platforms.
And NOT building scramjets, regardless if it makes sense or not.
It's a painful process of relinquishment:
Investments in novel air-breathing propulsion concepts and supporting propulsion technologies offer opportunities to increase system robustness and performance. However, these concepts introduce a new set of design challenges because of their highly integrated engine cycles.
They even considered two stage designs, fueled by *gasp* kerosene! And their performance was found to be great!
Of course, the military organizations are still going to specify some pointless point design based on some paper optimization with unfortunately unfounded assumptions, which they're going to build massively and fail, if it isn't cancelled before the program takes off... (thank god the latter happens already in today's world, much less money, effort and hope wasted)