Re re Sod Torpedoes
Sure, as of right now there are no really stealthy anti ship missiles (probably the Norwegian NSM is closest) since the use of ray guns was previously discounted :-)
However I suspect it would probably be easier to design and build a long range stealthy IR shielded (a la Apache/F117) turbofan cruise missile with a last 50 km smart dash capability than the proposed laser systems.
However your points about defence in depth are noted, and the fact that unlike our Navy, the Yanks are well aware of the importance of search radars being at 30,000 ft rather than 200 ft :-)
Cheers