Booster was lost during the transition from the high angle of attack recovery attitude to the vertical for engine restart. I presume it either broke up from stress from aerodynamic forces caused by the fuel sloshing or an engine blew due to cavitation caused by fuel issues. Have to wait for the debrief.
Starship made it through a full engine burn, though there were commentary remarks about a fire which may have been caused by the same previous problem, even after introducing nitrogen purging etc, which may have caused damage/fuel leakage causing the loss of attitude control due to outgassing.
PEZ dispenser door continues to cause problems and may need a redesign.
Not too worried about the booster - they pushed it to the limit and know how to bring it back safely when required.
Starship is a worry - that’s 4 flights where they haven’t managed to get data on the various types of heat shield tiles and structure during re-entry so they will have to have, at least, one more flight into the Indian Ocean before even thinking of a return flight and catch.
They haven’t managed one remaining previously flown booster, (B15, March) which they can expend on a water landing if they want to repeat with a modified profile for a water landing plus two remaining block 2 boosters (B16 and B17) before they get to the Block 3 boosters with an integrated staging ring and Raptor 3 engines.
There are currently 4 Block 2 Starship upper stages at various stages of construction (36-40) with 36 in the bay having its flaps and heat tiles installed. The Block status of the Block 3, tankers and lunar landers is an unclear.