Cassisi, 26, didn't rule out a tough week on the track as the Power picks up the pieces from their eighth loss for the year that came on the back of their impressive triumph over the Brisbane Lions last Saturday.
"We haven't thought about that yet but it's fair to say we'd be kidding ourselves if we thought we could just rock up tomorrow and things will just be normal," he said, after the upset loss to the formerly 16th-placed side.
"We can't just have a normal review and just go home and everything be normal,"
Coach Mark Williams said in his post-match press conference he felt "four or five players were particularly poor" during Sunday's loss.
Cassisi said he expected another "honest" review among the players when they regrouped back in South Australia on Monday.
"All our reviews this year have been like that. We have an open forum, we have a discussion, and we create an environment where you're allowed to question other people," he said.
"You can question people and their attack on the footy and their effort, and that will be no different tomorrow.
"It has to be done for our group to move forward, and we all need to be accountable for our effort."
Cassisi pulled his players back for a second meeting after Williams addressed them post-match. He said his message was about unity and the need to band together after the shock result.
"We need to stick together, and there's still a lot of footy to be played," he said.
"While it's fresh, we need to keep reiterating to the group that we are a team and that unless we work together, we're not going to get a result."
He said while he though Melbourne performed admirably on Sunday, he was embarrassed about the lack of intensity his side showed as a whole.
"Without taking anything away from Melbourne, because they played really good footy, we came over here expecting to win and that wasn't the case," he said.
"Our effort was embarrassing.
"To play probably our best footy for the year last week and then to serve that sort of effort up this week is contrary to what we try and do each week.
"We're professional athletes and we spoke about that with the players. It's our full-time job to do everything we can during the week to make sure in your first quarter and your first 10 minutes; you're throwing everything on the table.
"It's an area we need to improve in."
