No, not really. I did download some new imagery a couple months back, slightly better coloration, a bit easier to color-match/blend with GE-Pro or default textures, but not uniform from one area to the next, so I think I'll stick with the original.
I did a massive autogen upgrade while I was fiddling with the imagery, basically a repair to the existing agn which had many more than the max 600 trees allowed per tile. I reduced the number to 599 or less and got rid of some ugly bare areas that "wouldn't take autogen" prior. My own fault as I wasn't aware of the 600 tree limit the first time around.
That's about it, haven't had time for any upgrades to the field itself, sorry

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Jim