I think that the SSN(R) is shaping up to be a very good submarine for the RAN with all the capabilities that are being sought. The only problem is that it will result in a further delay before entry into service.
If the British are really keen to have the RAN choose the SSN(R) to have a significantly larger fleet to share the development costs, they may elect to accelerate the design process.
As HMS Astute’s reactor only has 25 years of fuel, the RN also has a pressing need to develop the replacement class as quickly as their design capabilities allow.
https://www.navalnews.com/naval-news...launch-system/