Blender to Photoshop: Ive used blender and im wondering if I should first optimize my objects using photoshop before importing to unity. I feel blender doesn't really have much control of color and texture of objects. Thanks

I may just not know much about blender, not sure.

Yes. Blender has some in-app paint and texture tools but nothing near the quality & breadth of Photoshop (or GIMP) so if you have either, use them.