Wow, a KB indeed!
Only quibble I'd make (not to set another KB in motion, or the like <wink> honest) would be that there probably ought to be a "flag" bridge, with a "super" flag bridge to go with the regular bridge. This would follow the command staffing trends in '45. Also, the quad 40's should all be radar-directed 3"50 DP dual mounts--but dual 40's could go in 1 for 5 or 6 of the 20 mm's, to follow one anti-kamikaze scheme.
There was a call, I seem to remember reading somewhere for "monitors" to support the invasion of Japan. I want to remember that an Des Moines-class hull was being considered for that. Now, there's a mental picture. Probably a Baltimore would have been needed instead. Another menta picture there. Like one of the Lex's removed 8" turrets as the secondary, aft, and a salvaged Pennsylvannia class forward . . .
Hmm, how about an American "Moscow"? Say a Tico front (with vls) and a Tarawa stern?