[WestPacSailor]

Will it be so controllable at a much higher speed?

Nope, drops like a rock. Same principal as the early capsule reentries. Gravity does all the work.

[RightWhale]

drops like a rock

So they'll just ride it down until wind resistance slows it to 100 knots or whatever, then drop tail and fly it to the runway? Seems like the major danger is that it might begin to spin.