great tune sir.
But i have to ask...what is the focus of the mix at any given moment? ( more of a rhetorical question)
When I am mixing, I like to look at each musical phrase and ask that question. What's the focus. What element did the arranger/ writer (or I) intend to use, primarily, to project the message.
Thinking about these things phrase by phrase or bar by bar may help you improve the mix.
Cheers!