Well, this is indeed a genre you don't hear all that often around here. But yeah, it is surely most welcome! This is a super fun arrangement.
The changes to the arrangement v1 to v2 add a lot in my opinion. The sounds are actually mostly pretty serviceable to my ears - the ensemble playing sounds genuine enough, like a band playing. Only the banjo feels rather mechanically sequenced, and the bass when it's exposed during multi-instrument dropouts (arrangement-wise, these spots are really good).
Arrangement-wise, the only thing to improve I'd say would be the ending - it kind of just stops, it could do something more there, like repeat the last phrase a couple of times, slow it down a little, or some other such signaling that the piece is coming to a close.
Strong stuff, I'm really eager to hear more. Good luck with the recording gear!