I would place the need for an apron extension on the airport campus and expansion of T3 as higher priorities than further work on T2 once the current phase is completed. The former should be constructed to provide resilience for the next decade of growth; the latter is required right now!
It's a conundrum how the airport expands (other then replacing small aircraft with bigger ones) without additional stands, and where the space for these stands comes from. Sure there are gaps between waves, but there are reasons why those gaps exist.