This is a great subject - and an historically "unsung hero" - as these old BBs provided for the various amphibious landings of WWII some of the most crucial and accurate fire support in the history of naval bombardment - far more effective, for example, than the newer Iowas were ever able to achieve (even by the '80s, with the help of spotting drones, IIRC).
And you're right - this doesn't look like such a bad kit at all - though of course I don't know exactly how much is your "lots of added aftermarket stuff". I think I do recognize Gold Medal Models' PE on the upperworks - and the catapult, which is truly a Thing of Beauty - but the deck-edge railing looks a bit flat. Whose was that? FWIW, IMHO for the main (weather-) deck, droop-chain railings from White Ensign Models - with GMM's running a close second - are by far the best, as they are the thinnest. Main-deck railing was generally much finer than the bar-railings of the upper-works, and the former tend not even to be visible in many historical photos. (Personally - and also usually at 1/500-600 scale - I don't generally bother to put on main-deck railings at all.)
Otherwise, the obvious resin components have very good features overall - with two caveats: 1) The little (Mk51) director tubs have very overly-thick walls - and your apparent replacement of the 40mm tubs with thin plasticard really shows the tremendous improvement, by contrast. 2) Many features of the moldings appear "softened" - like they were deliberately smoothed-down by the manufacturer (for sustainability of mass-production, I could well believe). For (just one) example, the little single-(5inch) open-mount guns appear to have excellent shape and detail overall, but all the edges are rounded/softened - so that they look almost like they're beginning to melt. This may be a function of the age of the mold design - and specifically its molding (RTV rubbers) technology, which by today has advanced to permit reliable, sustained mass-production with far sharper, finer details - as proven by Matty's Models parts.
Speaking of which, I noticed all the molded-in windows - especially in the foretop - still awaiting final painting are, again, features which Matty's Models could produce not only with crisper edges, and with glossy window-surfaces, but crucially in transparent resin as well. They wouild be slightly yellowish - and yellowing more over time (as you can see from differences between aircraft obtained for your Wasp build) but this can be offset pretty much entirely, simply by underpainting (the rest of) the part with purple. For a build like this one, Kevin, do you think modelers like yourself would buy such upgrade/accessories, having those characteristics/advantages?
Again, this is a GREAT build, Kevin - and one which (at the risk of devolving into yet another Matty's Models plug) could really use a truly kick-butt KingFisher, in (roughly) the same scale, to go on its gorgeous catapult! Let me know if you're interested, buddy - you'll already have (some kind of) credit for your kind donation of the Revell hull bottom, etc., anway sir.
Meantime, THANKS again for this submission, and we'll definitely post her completed pics, when ready, to our Gallery here Kevin!