An excellent manefsto! Now all you need to do is get a hoody and a big stack of postage stamps, and you are all set...
Are legs really that useful in zero G? Only two arms when you could have three?
Yes, because even tracked vehicles have trouble going up 45 degree slopes. They want a robot that can climb hills, jump into pits, hang on to a irregular shaped asteroid, etc. You don't really think that this would just be used in space exclusively, do you?
Your suggestion about three arms is interesting, although you can argue that it might already have 4, since it is quite imagine-able that the feet might have articulate fingers/toes.
They aren't pandering to pop culture, it needs to be basically human shaped, since any vehicles it will be traveling in will be built primarily to accommodate human shaped astronauts. Or were you thinking that NASA should redesign everything to accommodate a three armed, no legged robot?
"There are things that are so serious that you can only joke about them" - Heisenberg