Part of where I come from is from listening to (possibly self proclaimed) defence pros (ASPI 5 feb 2020 Time for Corvettes for the RAN).
Bit of a luddite not good at posting links.
One of the greater problems with expanding the RAN is lack of command trained officers and senior non com sailors.
These vessels in addition to everything else they could bring will help with that.
Yes being a CPO on a FAC with 20 crew is different to a CPO on a destroyer with 180 but any and all experience adds up.
As Spoz has said, there is no lack of command trained officers in the RAN.
For over 50 years opportunities have existed in the Three previous classes of Patrol Boats, LCH’s and MW ships. Whilst small these provide the full range command decisions, many operating in extremely isolated areas away from other units.
Not only does this provide a fantastic stepping stone for junior officers to further command, it equally applies to senior NCOs in the crews who are totally reliant on their own resources, particularly engineering specialists.
Command decisions being made here only differ in scale with those made later in an officers career.
The experience is invaluable.