The rest of the elements you added around the core guitar and vocals are very well done. The arrangement, the structure and the presentation of the overall package from a songwriting and performance perspective is top notch, really. There is no question that the song itself and the vocals shine through here, so you definitely accomplished what you set out to do.
I don't know that I would say that it is coming across as having gone to far. I don't think so, no, but it is an interesting proposition to ponder. From what I hear, you went to a lot of effort to build out a very nice canvas for him indeed, but then, perhaps equally, you put effort into keeping that production out of his way. Perhaps where my (highly subjective) 'mixing intuition' wants to go as I am listening is to a place where the full production is embraced more as if this was a full 4 or 5 piece band performing, moving and breathing with a presentation that accentuates the hills and valleys, restraint and release and intimacy and intensity of the song. Right now, a listen through is somewhat static in this regard, but I am not contending that this is negative at all, it is just what is presented.
Different strokes, completely and utterly subjective, but hopefully fun to discuss nonetheless.