Mark, thanks for listening and responding. I tend to agree with you about the mids. I've done a remix and scooped the mids a bit, and I hope that clears things up. I will post it soon.
John, thanks for encouraging me to add the harp! I believe the instrument you're having difficulty hearing is a rhythm guitar in the left channel during the prechorus and bridge sections. I will try increasing the volume on that part to see if it helps the production. I left it down on purpose so as not to cover up the main tracks. Plus, I pan from front to back as well as left to right. Thanks again for you time and input.