They're still having some significant burn through problems on the upper stage fins during reentry it looks like. Way better than last time but the top part of the fin was glowing far a while after the main reentry finished.
Maybe. Kind of impossible to know until we see launch costs but you could make a much cheaper upper stage than they have if you wanted disposable. Trick with that is you need a payload heavy enough to justify it. Has SpaceX talked much about a disposable upper stage version of the system?
