I can't see why Australia can't organise a ODI Tri series where Aust include NZ every summer.
Like what they're doing with t20 series.
Aust vs England in Australia x 2 in Australia. Aust vs NZ 1 in Oz, 1 in NZ and NZ vs England x 2 in NZ. Can raise to 4 games with same ratio split.
Make ODI wins go towards WC qualification and seeding too.
Aust should be playing 2-3 more tests per summer too esp in January.
Summers should be:
Summer 1 - England Ashes 5-6 tests;
Summer 2 - India 4-5 tests, 2-3 before against WI or Pakistan etc;
Summer 3 - South Africa 4-5 tests, 2-3 vs SL
Summer 4 - WI/Pakistan 3 tests, NZ 3 tests (Adelaide, Melbourne, Sydney).
Mid year 1 - 3 tests vs WI/Bangladesh at home
Mid year 2 - Ashes tour
Mid year 3 - WI tour
Early year 4 - India 5 tests
Early in year still NZ and Sourh Africa 3 and 5 tests.
End of year 3 tests vs SL, Pakistan, Bangladesh