As it turned out they also fell to defeat - 37-19 in Leinster - handing Easterby's troops a trip to Ulster in the semi-final on Friday.
But having assessed what went wrong last time out at the Parc Y Scarlets, coach Easterby claims they will be better equipped to take on the Irish province at Ravenhill.
"We're lucky that we've got an opportunity seven days later to put things right," said Easterby.
"It's not pretty viewing having watched the footage back.
"I think all the players have understood the lack of quality and intensity that we brought to that game, and that showed in the result in the end.
"It would have been a disaster if we had found out that the Ospreys had won in Leinster and we'd have had to wait three months to rectify that performance."
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