Re the further training, it would be that required to standardise Army graduates to the 2FTS standard as achieved by RAAF and RAN; eg high-low TOT nav, more advanced formation, high(er) speed and altitude IFR work etc.
Ideally, I'd want all ADF pilots graduating from 2FTS. As BR71 has previously alluded, RAAF helicopter people have moved with a good deal of success between types, many on to fast jets over the years.
If we were to go towards an ADF air organisation with more fluid transfer between services, it would be greatly beneficial to have this pool of pilots all with nominally equal starting status. Of course, it'd be costly, which would probably put the kibosh on it, but in a small setup like ours, flexibility is a bloody good thing to have.