Only Jose Canas, Wayne Routledge and Pablo Hernandez kept their place in the Swans side from the team that drew 1-1 at Stoke, as Monk prepares for Thursday night's Europa League visit of Napoli.
Jonathan de Guzman equalised for the Swans after Lacina Traore had put the hosts in front, but second-half goals from Steven Naismith and Leighton Baines ensured that a Wembley return would not be on the cards after last year's Capital One Cup success.
Monk backed his selection choices at Goodison Park and says that their hectic schedule leaves him with no option but to rotate his squad.
"When you have got seven games in 21 days, it is impossible to play the same 11 in every game," he said.
"I can only judge the boys on the week I have had and their attitude has been magnificent, every one. From the first day, I said everyone would play and I was true to my word.
"It is a squad game. Everyone seems to be amazed when there are rotations.
"With Europe, you have to have that rotation. Every side I pick is a team to try and win the game."