pop is a different beast all together as there is less to "hide" behind. No cool sound design things but real instruments and vocals require a more balanced approach.
Overall music wise the drums really can be thicker/louder. Little ghost note trick can help out easily on the snare. The piano panning needs to be addressed and the vocals DE-essing plus level.
For vocal leveling play only the drums and bass. Then simply imaging it on stage and turn up the vocals till it makes sense. After turn up the harmony group.
Good luck man!