NEW ADELAIDE coach Phil Walsh remains undecided on who will captain the AFL club next season.

But he's adamant the AFL's interchange cap should be reduced, placing him at odds with some other senior coaches.

Walsh says his decision on who will lead the Crows next season "won't be a long, drawn-out process".

But the fledgling head coach wants to see how incumbent skipper Nathan van Berlo, who missed the entire 2014 season because of an Achilles injury, and five other players respond in match simulation drills after Christmas.

Walsh says van Berlo and fellow leadership group members Patrick Dangerfield, Rory Sloane, Scott Thompson, Daniel Talia and Taylor Walker have impressed him.

"I just want to get to know them a little bit better and just see exactly where that sits, there is nothing mysterious in it," Walsh told reporters on Friday.

"We'll get a lot more into the match simulation training (after Christmas) and then you start to see who the real leaders are in relation to communication."

Walsh said the fact Dangerfield and Sloane had yet to commit to the Crows beyond next season won't factor into his decision.

The Victorian-born duo is expected to field free agency offers from rival clubs.

Meanwhile, Walsh called for the AFL to reduce the current cap of 120 interchanges a game to better protect players from injury.

Many coaches want the cap, introduced last year, to be abolished.

But Walsh favoured reducing it to 80 a match, noting the AFL's recent transformation to a high-intensity running game could be responsible for more player injuries and that a cap set at 80 could slow things down.

"If they really want to make a change, they have got to bite even more off the interchange so it becomes harder and harder to play that style," he said.

"I'm not a fan of the interchange. I think it changed our game too dramatically - we went from a sport where in a 10-year period there was probably 20 interchanges in a game to 150.

"And it has never been part of our sport."

Walsh, a long-time assistant coach who was appointed Adelaide's coach last October, said the AFL knew his view.

"Maybe just because I was an assistant coach my voice probably didn't get heard," he said.

"But there are a number of coaches within the industry who feel that the interchange cap should come back.

"I was radical. I would rather go back to 80 interchanges."