The instruments here sound right at the front, yet the voice has been placed far at the rear, as if they were singing through 50m of tubing. I would look at where you're placing your instruments spectrally, and then analyse this mix. Just my feedback for your benefit.
I agree with Professor Smooth here. I do like the space that you have placed the vocal performance in, perhaps you can place the instruments into this same environment. It may work well.
Dave