Is that you playing keys in the beginning? Very nice riff.
I think that 1:06-1:25 really needs a syncopated beat in the background with the mids and lows cut out, I'm thinking something rising in volume steadily.
I could show you an example: (2:01- 2:17 in this song I linked below) Would add a nice contrast to the drum beat at 2:17 (it would come in with more effect and punch, and make that beat sound more groovy)
I also think at 1:26 You need to switch it up by introducing a variation of that same beat that lasts until the next break at 2:10.
Switch up the snare accents to better match the altered vocal rhythm. This is just advice from a drummer.
Don't get me wrong the current beat works, but you need to add some variation in that section and you need to EQ it a bit punchier as this is the core of the song.
Maybe even get the vocalist to increase his dynamics for that section if you want as a trial.
This is just general composition advice though.
Sounds to me like you didn't experiment much with the arrangement so far. Or maybe this guy wants it super simple.
But you do have lots of options to have fun now! So mix it up homie.
I might be stepping out of my league saying this, as you only asked for production advice.
I can't give you any production advice as the mixing and levels are on point . I'd personally increase the drums to be a tad loader over-all (like 5%) and maybe the mid's of the vocals by a tad (5%). But hard to tell how that will effect the melody layer. Hope this feedback is of some use to you..
