Not surprised if he stays at Souths with Gagai leaving. There's a starting spot there for the taking.
Who they got
Mitchell, AJ, Graham, Paulo, Cartwright, Mansour, Marsters*, Milne*, Moga**, Burns**
*CO
**off contract
So Burns probably determined by if they want to take up club options with Marsters/Milne more than anything. If they keep one or both of them it that's probably not a great sign for his prospects there.
On the other hand if they are trying to sign him before deciding on those that is a better sign for him. There may be a deadline by which they had to confirm those, seemed to be common that POs for next year had to be decided by the finalising of the 30 man squad this year so CO may have been same/similar.