WEST Coast coach Adam Simpson says he would support a system that would make it illegal for rival clubs to approach assistant coaches mid-season.

Carlton is on the lookout for a new head coach after sacking Mick Malthouse earlier this week.

John Barker will take the reins of the Blues for the rest of the 2015 campaign, but the Blues are expected to start their interview process for a new coach before the season is out.

Current assistants such as Peter Sumich (Fremantle), Brendon Bolton (Hawthorn), Stuart Dew (Sydney) and Matthew Nicks (Port Adelaide) are among a host of candidates who could potentially be in the running.

Simpson said the process could serve as a distraction for rival clubs, especially during the finals.

"If anyone from our club gets approached, it is going to be a distraction," Simpson said on Saturday.

"At the moment until they change the rules, it's open slather.

"If there's a collective response from the coaches' association that points towards maybe waiting till the end of the year, I'd be in for that."

West Coast will be aiming to make it six straight wins when they take on Geelong at Domain Stadium on Sunday.

The Cats thumped West Coast by 75 points last year, with the Eagles failing to kick a goal after quarter-time.

Simpson says his team has evolved since that game, and he's backing them to put in a stronger performance this time around.

"We got whacked between the eyes in that game," Simpson said.

"We haven't beaten them for a long time - since 2012.

"Our team is better educated now. Things are probably more instinctive.

"We don't need that one or two seconds to click into gear, into what mode we're looking for."

A potential match-up between brothers Scott and Joel Selwood is one of the drawcards of the match, but it may only eventuate in small glimpses.

Scott made his injury return as a sub in last week's win over St Kilda, but the 25-year-old needs another few games under his belt before he's back to full fitness.

"He's missed six weeks of footy, and he's only played a quarter as a sub," Simpson said.

"So I'm not putting all my eggs into the Scott Selwood basket.

"Whether he's sub tomorrow, or he plays, it's what's best for the side."

Geelong have been hit and miss this season, and at 4-4 they need to make a move if they are to be a genuine premiership threat.

In contrast, West Coast (6-2) are flying high in second spot, but Simpson isn't writing off the Cats.

"They have 10 premiership players in their side," Simpson said.

"They are more experienced in age and games played. There are some wins still left in the Cats, that's for sure."