After two weeks of constant, m onotonous staring at the UV Layout Editor, I've finally managed to finish up UVing all of the assets in my sets. Granted, many of which were duplicate models repeated over and over like one might see in my cityscape backdrop, but I had the added effort of deleting any duplicates, UV-mapping the single models and re-duplicating each asset. This did give me a chance, however, to rethink my sets and give them some minor layout tweaks post-UVing.
Here are some samples of the finished UVs--posting
all of the UV images here would be bordering on the realm of insanity; there's at least a hundred separate UVs.