[ I listened to mix3 ]
Again something very Pink Floyd-like from you, some licks remind of "Echos", the gospel soloist of DSOTM, that's good.
Even in version 3 you could have raised the vocals a bit more, but you are close

Mix-wise, I'd probably lower the treble on the left guitar a bit so it's more balanced with the right guitar.
Just an idea: it would be interesting to see what the piano running through a guitar amp would do in some places.