You can get the aztecing decals 3rd party as well as enhancement/correction parts. CultTVMan and Starship Modeler both have them in their catalogs. I'll be diving into this kit when I finish my 1/1000 Enterprise TOS and Enterprise A.
I've built the whole fleet of Enterprise variants in 1/2500, and the decals provided with those kits were tremendous. PL includes the aztecing for the Enterprise A in that kit. I agree it's too bad that AMT didn't follow suit.
I've seen notes on the web that the B variant is undersized, based mostly on the bridge. I measured out the kit compared to the Star Trek reference manuals, and though the bridge may appear undersized, the kit is spot on for 1/1000 scale...