The current edition of "Proceedings", published by the US Naval Institute, has several articles about interoperability of Allied Fleets and the need to be able to counter multiple nation threats rather than just the Russian Navy.
Some studies show the USN needs to have 355 ships....and can not reach that number until 2034 or so with new construction.
A companion article raises the concern that USN Cost Cutting Measures has focused upon Manpower cuts rather than other areas.
We saw a similar issue back during the Reagan/Lehman buildup when ships were built without adequate attention being paid to later years support and crewing demands.