Aloisi, along with Heart teammates Clint Bolton and Simon Colosimo, Czech midfielder Karol Kisel and of course captain Steve Corica all helped the Sky blues to the Premiership/Championship double last season but none of those players are with the club anymore.
The 34-year old former Australian international feels that the loss of so much experience has contributed heavily to the fact Vitezslav Lavicka’s team are sitting second bottom on the table.
"I still think they've got a good side but they're down on confidence and you have to say that they lost a lot of experience . . . five or six players they lost, and it's been difficult," Aloisi said.
"They had a slow start and people didn't realise the (value of the) players they had.
"The big one for me is Steve Corica. I think he was very under-rated. For me, Steve Corica, as a number 10, was one of the best around. He was brilliant for them, not only last year but throughout his career with Sydney FC and he won two finals."
Ahead of the meeting between the two clubs on Thursday night, Aloisi said he wasn’t too worried if he and his former Sydney pals were given a harsh reception as winning was the only goal they have in mind.
"Look, if we don't get a good reception we don't mind," he added.
"We just want to do well for our team. But looking at it, maybe they should give us a good reception because we won something with them. We won the double and it was the best year that they've had.
"I'm not expecting a good one, though."