There's also another point to be made - all vessels prior to
Atlanta, they are the result of the expanded treaty limiting cruiser tonnages to a higher limit (and higher numbers) than OTL - 21 Heavy Cruisers vs the 18 in OTL for the US, for example. The biggest expansion is 16 lights vs the 9 of OTL, but it was a result of the compromise decided in the previous thread (long, long discussions therein) so that the US could get their cruisers. Overall, the number of Treaty cruisers of the Americans is about 100k higher than OTL, but so are the caps for the other nations. The Japanese have 14 heavies vs the 12 of OTL, meaning they possess the same ratio, and many of those are the newer
Tone. And, just as OTL, the
Mogami scared much of the US Navy, as these were ships with the (original) suspected 15 gun armament being unmatched in the world.
The Fall of France, one of the major powers, and the German Hegemony over much of Europe still exists TTL- though it was far bloodier,and the Anglo-French are in a strong position, Germany possesses the mainland and has at its back a favorable relationship with the USSR, making the only potential (at this point in time) ally being Italy, which will, of course, not partake in the war in which it'd fair so poorly. The threat of German raiders are still strong. Combine that with worse relationships with Britain than OTL (not quite as close, certainly) and Japan's ongoing war in China, and there are many enemies who are mobilized and could take advantage of American negligence.
Regardless if Japan seems saner now, that means they're only the #2 geopolitical rival expanding their power in the Orient at the expense of a state the US desired to maintain open trade for and which many citizens feel some sympathy towards.
Combine that altogether, and the US has ordered 18 Light Cruisers, 8 Hybrids, and 10 Heavies a few months ahead of schedule (only one of those ships has been launched, much less commissioned) compared to OTL, where the US eventually completed 27 Light Cruisers, 9 Light Carriers, and 14 Heavies of the Cleveland, Independence,and Baltimore classes. There
is less rush... compared to OTL, as vs throwing down another run of 9
Vincennes or so, they are moving ahead with a successor design as mentioned, and there likely won't be a Navy Composition bill of 1941 (Dec 23) or a Naval Expansion bill in 1942 to bolster numbers with repeat runs.
The gameplan for the US is expansion yet maintenance of the fleet - the next wave of vessels would be expected to supplement and replace outdated units in the fleet in frontline duties (though, thinking this over did help a bit - the CL-109 would be the replacement for the
Omaha, not the much newer light cruisers). I'm going to make a few edits to make things a little bit clearer as well.
The initial order itself is larger, but all of the projected growth put down is almost 72% of OTL projected projects, excluding the
Des Moines and
Worcester from the calculation. Including them, it drops to below 58%. In OTL, 61 War Project cruisers were completed at some point in time (a few years down the road), so if every single current projected is completed, then and only then will they outnumber OTL (including the proposed designs).
Though, I did alter the list to denote whether a ship is laid down or just scheduled; I have the dates for laying down by year, so it's an estimate. By that, only 15 ships have a keel laid down, and only one ship is launched; that should match better.
Anything I say is, of course, contingent on
@WaterproofPotatoes of course.