You would hope all four of them are solely squad fillers
Howieson definitely good enough to step up. Same Woud, if he can remove the bad gaffes from his game. There have been worse keepers in the ALM.
Randall too early to tell, but looked good in the Olympics qualifiers last year. I'd rather have a bunch of Kiwis signed, than Aussie journeymen. That's one of the beauties of a 2nd Kiwi team, expanding the Kiwi pro player base.
Without the Nix existing the AWs don't make the 2010 WC. At least one future AWs star is going to get their start at Auckland FC, maybe even next season.