"indeed i had doubted them myself til now!"
There's no need to doubt, that there were such ideas. But there still is a difference
between having an idea and being able to realise it. "Report Of The General Board,
United States Forces, European Theater", that sounds very much like results from
interviews and interrogations, to my opinion not the most reliable source. To make a
sketch of a piloted V2 is one thing, it not even would have been hard, to make detailed
drawings, but actually building this thing, launching it and bringing it back with its pilot
alive would have been a whole new ball game !
Reading about such themes, I always have the strong feeling, that many still believe, things
like the piloted V2, A9/A10 or maybe supersonic jets were just around the corner in 1945.
A healthy lot of fundamental research would have been needed, and if you look to post-war times,
when comparable projects actually were realised, you can get a feeling of the needed time-
frame. From the very beginning of the war, the german industry simply wasn't able to develop
such things, that means to bring such ideas to realisation in a reasonable time. The capacities
for engineering and research already were already overstressed for bringing the more conventional
weapons to the front.
One of the main reasons for the defeat of Germany was that its economy in relation to that of
the US was like a middle sized workshop compared to factory. The craftsmen in that workshop
may have many ideas, when drinking a beer in the pub at the end of the work day. But when they
try to realise them, they may get whipping !