I'm no studio guy, I'm live sound, my job is to duplicate what they hear on the album, so take anything I say with a grain of salt.
What I am missing is either vocal structure, OR leave that be and add background FX/Fillers. The chorus fine, the mix is fine, the bass is fine, let those ride. Build around it. The chorus break seems to be your hook. Leave it.
What I mean by FX is the air needs filing. Could be very simple subtle percussion instrument rythem, keyboard FX....I guess what I'm say is, it's a little dry. The way it's structure it would take very little at low volume to fill that void. It would be something way in the background, but it need it's own hook. That one little subtle thing can really widen it out. The chorus is already balls out, so you have room to on rest. Pink Floyd was seriously magical with that stuff....but there are also other approaches. If we removed the back ground FX from PF songs it would be dry as a bone. They take something very simple and bring it to life....and that my friend is an art. That will separate you and bring you out front with those hooks.
You wouldn't need to change what you have, just add and build around anything before the chorus.
This is just a mere example off the top of my head. Just listen to the fillers. No dead air
More exaggerated with layers,.. listen deep.
