Using AV with no tower would have been costed into business plan for Jetstar from the beginning, so they won't be keen to see a tower go in there.
Now what exactly would the cost (neigh, charges) be for A320 for landing and departure; more or less than Hobart/Launceston/Coffs Harbour etc.? They already pay for the RFF component, do they not?
What sort of horrible ATC charges would apply to upset that business case?