This should have probably been announced back when the sea1000 was announced..I can imagine that the naysayers will put a negative spin on this, linking it to ‘problems’ with the Attack class.
On the other hand, I’d say it a good move to ensure ‘all’ six Collins stay relevant for the equivalent of another FCD, this to me is part of ‘Plan B’
Upgrading and life extension of Collins is no suprise. It would have been required even if the attack class had been bough years forward.
There is a global shortage of subs, other navies are also life extending their platforms. Its the only meaningful way to increase subs in service.