Comment Re: International waters (Score 3, Informative) 61
The first stage is suborbital, so that's not really an option. And when it comes to aerodynamics, on the way up it's pushing hypersonic speeds with a not-even-supersonic-friendly profile, not even the usual "nose-needle" to break the shockwave, presumably because it's having to fight gravity the whole way without lift surfaces, so can't face directly into the line of motion. Plus with the fact that it doesn't start really pouring on the speed until it's mostly clear of the atmosphere anyway.
Bottom line - it's a rocket: with minimal lift surfaces efficiency isn't really high on it's feature list to begin with. On the return trip it's free to travel at much lower speeds though - it's basically a tradeoff between air resistance and the fuel consumed to hold it in the air instead of falling like a rock. Still, fuel is currently only a couple percent of the total cost of a launch, so even if you had to double the amount used you'd still see negligible effect on the total launch cost. First they have to get rocket reuse working - once you can get a half-doze uses out of a rocket, then maybe it makes sense to start worrying about efficiency on the return trip.