It was built on the cheap and it paid the price for that. No dual offset firemain, not enough pumps on the fire main and not enough portable pumps.
BMD 3.6 and 4.0 is not available on the computer baseline the RAN is getting. Go look at the list of Burkes and Tico's with BMD. All of them are older non-COTS ships.
The upcoming COTS BMD version is BMD 5.0 but for that the AWD's would need a whole new computer suite and possibly consoles (Baseline 9), modifications to SPY-1D(V) such as the new multi-mission signal processor.
Not cheap but certainly not "billions" of dollars.
Nope. The version of Aegis on the AWD's is not compatible with any current or planned versions of Aegis BMD.
The AWD's have OpenAegis, which is COTS based? No plans for a BMD release so the customer would have to fund that? Are there any other similar fleets in the world (SK or Japan) which might want to collaborate?