Blues coach Brendon Bolton has conceded Dale Thomas would regret striking Swans defender Jeremy Laidler in an incident that will cost him a spot in the season-opener against Richmond.

"We're a footy club that likes to play on the edge, however looking at the hindsight, and I think Daisy's looked at it, he would've done things differently, no doubt about that," Bolton said.

"Our whole playing team gets a really strong learning opportunity from that."

Bolton said the Blues were "quite optimistic" about skipper Marc Murphy (shoulder) taking his spot against the Tigers following another strong training session on Wednesday.

Jacob Weitering seems assured of a debut next Thursday, although Bolton said the No.1 draft pick needed to get through another week of training after showing "really positive" signs in the NAB Challenge.

In other news, Blues president Mark LoGiudice has offered cautious praise for Collingwood counterpart Eddie McGuire's bold Victoria Stadium proposal.

"It's a great idea and it might be good for Melbourne," he said.

"But from what I understand and have read in the paper he's talking about selling Etihad Stadium for a billion dollars and the new stadium's going to cost a billion dollars.

"If they're the numbers, then I don't see the financial sense in actually doing it.

"We need to understand what's in it for who's going to play there.

”We'll do what's best for Carlton at all times, whether that's Etihad or the new stadium or the MCG."