Chay, know this is a new song, but...it sounds uniquely like you, with a new twist or two.

From your description this was clearly a challenge, though the results don't show it. On my listen, the organ dominates the early section, and the first solo is further back in the mix, but I like it there. The middle section through the electro flute are a change of pace, and it all sounds great. Wouldn't have thought of a fiddle solo to start the wrap up, but it works really well. Nicely done!
Your discussion about level setting really resonated with me. I probably average seven "final" mixes to get things sounding right with multiple soundstages. Low level monitors and medium level auto listening are my hardest challenges. But if those two sound right, everywhere else tends to work out.
Enjoyed your tune!