The top six nations - New Zealand, Australia, England Jamaica, Samoa and Malawi - will contest the world netball series which begins in Manchester on Friday.
It is netball but not as you know it. Or netball with the "wow" factor if you listen to the public relations team.
Rule variations include six-minute quarters, rolling substitutions, power plays and double points for goals scored from outside the shooting circle. The team which concedes a goal will get the centre pass.
You get the feeling Muir is not convinced some of the changes are necessary, but she is excited to see where the rule innovations will take the game.
"I think the rules will evolve a little. This is just a trial run, really," the Netball New Zealand president said.
"I think it is something which needed to happen for the game," she said, adding the International Federation of Netball Associations (Ifna) is hoping the shortened game sparks new interest and, ultimately, helps bridge the gap between the top three or four nations and the rest of the world.
Ifna is hoping it will do for netball what twenty/20 and one-dayers have done for cricket. And if it takes off Muir can see a whole new type of player emerging.
"It might be a bit like the cricket situation, where we have the nucleus of the team with one or two specialists. It may be a new type of player that manages to play these rules successfully."
Muir said it would take the players time to adjust to the rules and she wonders if a side like Malawi could be the real surprise package.
"I think countries like Malawi have to be watched. They are uninhibited and they might have people who can shoot those goals from out there. The Malawi under-21 team had some players who tried some different things in the shooting circle."
Steel coach Robyn Broughton is also keen to see how the players adjust. She believes doubling the points for goals scored from outside the circle is a good innovation which might help free up space in what has become a very congested area on the netball court.
"I'm quite interested in seeing how it goes because I'm concerned about the goal circle area in our game," Broughton said.
"It is very difficult for us to get movement in the circle now and, hopefully, this will open it up. I think that shooters who are shooting from further out should be rewarded and, at the moment, if you shoot from way out, you get the same. So a lot of shooters don't shoot unless they are right under the net."
Broughton was less convinced about power plays, which allow each side to nominate one quarter in which goals scored will be doubled in value.
"I realise that a lot of sports are using power plays . . . but I don't think it will help the game much."
Giving the centre pass to the side which has just conceded a goal does not sit well with Broughton either.
"But the shooting rule is interesting and I do think rolling substitutes are a good idea. I think we should be able to substitute a bit easier than we are able to."
Broughton believes Australia and New Zealand are best-placed to adjust to the format and shape as tournament favourites.
"The Australians will shoot from anywhere and are not so concerned about getting closer in. The English I'm not sure about but the Jamaicans, well, Romelda [Aiken] likes to shoot from right underneath."
