OK. Time for an update...

This looks pretty good I think. The brightness is just right from what I can tell.

Two Testors copper painted brass photo-etch grills nest to form the deflector dish. Glued on with Kristal Klear:

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USS Enterprise E - Nemesis-WIP - Lower Saucer Aztec and Defector Dish by Steve J, on Flickr

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USS Enterprise E - Nemesis-WIP - Deflector Dish Aglow by Steve J, on Flickr

Some of the aztec decals were too short, some were a little long. I was able to rob from Peter to pay Paul a few times but there are a few areas I will need to make up my own aztec "decal" to fill in the blanks. Also one stretch of light aztec decal on the upper side face of the phaser strip tore somehow and some decal is missing so I will paint a simple aztec pattern on some leftover clear decal sheet and patch the holes:

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USS Enterprise E - Nemesis-WIP - Lower Saucer Aztec Touchups by Steve J, on Flickr

The aztec pattern on the decals is very light and not showing much contrast against my hull color soooooo ...

I am going to go back and add some darker grey spots using a fine tipped brush and a mix of light grey, white, and light sea grey enamel.

Here are a few I just painted on the existing decal:

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USS Enterprise E - Nemesis-WIP - Lower Saucer Aztec Retouching by Steve J, on Flickr

Not a bad job IIDSSM.  I used a 20/0 pointed brush to make these wing ding type shapes. After a few minutes  I scraped the edges using a stubby exacto knife to sharpen and square up the corners. This is not an exact copy of the CGI image but I tried to follow the spacing of the panels with my brush and my own custom shapes. I also tried to mirror the aztec shapes and locations between the port and starboard sides. :

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USS Enterprise E - Nemesis-WIP - Lower Saucer Aztec Retouch by Steve J, on Flickr

Next up is sorting out and attaching the upper nacelle warp grills...