The A320 ops to DPS are short term only (perhaps 1-2 months), until Tiger has approval for the B737. Tiger's first B737 to be added to their AOC has been undergoing crew training this week and once they have the B737 on the AOC another 2-3 will be transferred rather quickly from Virgin to Tiger.
So although the A320 is not the ideal option and may require capping the pax or a tech stop in Darwin, it gets them back in the market. The bogans that fly to DPS will forget the last few weeks once Tiger offers a sale to DPS when the A320 starts.