Every single other club has got rid of their foreign coaches somehow, and have all hired Australian coaches. I don't think that is a coincidence, there must be a reason for it.
I don't know. Similar things have been said about marquees in the past (the ones who come here are just after cash, or cr*p and never work out etc), but I think the tide has turned on that this year a bit with Ono, ADP & Heskey.
So do I think we should be hoping for an overseas messiah to come and coach? No. But do I think we should be ruling anyone from further off, just because others haven't worked before? Definitely no.
Edit - didn't see some of the other replies before posting this. In regards to reputation of Aus coach drawing Aus players. I'm not sure it's quite as simple as that. And that would really only work in the short term anyway. After the first season, the reputation is going to be made on results, team culture etc, and not on where they've come from.