St George Illawarra coach Paul McGregor is urging disillusioned Dragons fans to accept Brett Morris's departure and move on.

Morris' defection to Canterbury to play with twin brother Josh, his long-time NSW and Australian teammate, has caused considerable angst among fans of the famous Red V.

Some have even threatened to give up their club memberships.

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McGregor, though, said it hurt him just as much to see the try-scoring ace leave the Dragons after eight years at the club.

"It makes me sad because Brett has been a long-time friend and I've known Brett since he's been a young boy and I've coached Brett and been his strength and conditioner before," McGregor said on Wednesday.

"We lived probably about 10 houses apart, so it's never good.

"I drove past his house the other day and saw him in his Bulldogs gear and it's never nice.

"But it's reality. It's rugby league; it's professional sport and I think we've all got to move on from it."

McGregor said he empathised and understood why some of the Dragons' faithful were disgruntled.

"But we didn't want Brett to go. Brett wanted to go," he said.

"Brett thought his best future was with his brother and with a different club.

"No-one will replace Brett but someone will play in his jumper and someone will do the club proud, and that's important.

"So we've just got to let that go."

The Dragons have missed the past three finals series since winning the premiership under supercoach Wayne Bennett in 2011, and skipper Ben Creagh admitted that his side's pack didn't aim up for much of 2014.

"There was a fair bit of criticism directed at the forward pack early in the season and a lot of it was warranted, I thought," Creagh said.

"I think we lost seven games in a row there and the opposition forward packs were putting it over us.

"But the second half of the season I thought we turned that around. We gained a lot of confidence from that.

"We had a young pack, we had some new players who hadn't been at the club before and the longer the season went on and the longer we stay together, the better we'll be." 

AAP