The DynaSoar was a screwy idea in search of a mission. In fact, it still exists today, and ultimately culminated in the NASA Shuttle.
Other than that, it is a basically worthless idea. Why does it need a pilot? An ICBM can do the same job, cheaper and better and safer.
Now that's killing flies with a hammer! Yes, an ICBM can take out helpless fighter aircraft flying below...but the DynaSoar could be armed to take out such fighters conventionally from up in a safe orbit or sub-orbit.