Unless the individual state boards have enough freedom to do rights deals independently of Cricket Australia I would be very surprised if they weren't exclusive.Do you think CA would work with two publishers (separate games) at the same time? It would lead to licensing related issues & disagreements regarding Aussie players between the publishers IMO.
The only other path to large scale licensing are in sports with powerful players unions that do collective agreements outside the league (resulting in licensed players in unlicensed teams) - I don't think Cricket has that kind of thing to much of an extent.
Considering how restrictive the licences are on AC13's small editing options, I think they do more harm than good outside of the marketing perspective. But how many times can you say 'official' before someone mentions 'career mode' - I know what I'd choose.