I'm actually not sure what is going on with that play. Without JC's voice indicating otherwise, I'd bet that Lamb made the wrong cut and that the play was meant for AO.
If Boat was supposed to hit Lamb on the curl, there are two major problems: 1) AO is more worried about getting position on the right side of the paint than in facilitating Lamb's cut. AO basically pushes his man up high, right into the path Lamb would be taking, instead of either trying to seal him back into the paint (for a driving lane) or sealing him low along the baseline (to give Lamb a floater). AO just clogs everything up. 2) Giffey stays on the near side instead of cutting baseline to vacate that half of the floor. As a result, Lamb would be curling into a traffic jam with two help defenders nearby (AO's and Giff's - plus his own guy trailing) and no spacing. It's a dead end.
One sign something was botched: when Lamb doesn't get the ball, he doesn't continue in his path - he basically bumps into AO and retreats back to the spot from which he came. That's not the way plays usually work - it isn't a very economical use of motion to cut and retreat. If Giffey made a baseline cut - that would allow Lamb, if he didn't get the ball, to continue on his curl to the near side corner, and the floor would still be balanced for an entry pass to AO, or for the next phase of the offense.
