Except for layering 8 vocal tracks, seems pretty standard. I've done a few country albums and the techniques described are mostly what I would call standard issue. I would add a couple tips:
Fiddle and slide quitar can be death to mix. I quickly learned that slide players have their moments... but there's a lot of crap that you don't hear because they have their volume lowered with the volume pedal. Even though it's hard to detect, if you can cut that stuff out with volume envelopes, it really opens up the mix.
I record three good passes each for fiddle or slide parts so I can choose the best parts of each pass.
I have also learned to be absolutely sure you like the way the fiddle sounds going to tape--you can pretty much forget fixing it with eq.
I was surprised to find my Rode NT1 was great for mandolin, I don't use that mic much anymore... but it's hyped high end really improved the sound.
I found the Oktava 319 was good for fiddle, it's mellow high end took some of the "edge" off.
Hope this helps someone...