One of the things I loved in The Flash Season 1 was when we got to see Barry at his day job. Not only is Barry a great speedster, but also a gifted CSI.
A recurring problem in The Flash is that several characters are barely shown at work. Everyone is usually just at STAR Labs which I do see as an important aspect of this show.
But not showing Iris as a reporter or Barry as a CSI shouldn't be the case. What I want to see from The Flash Season 4 is everyone, including Barry, getting to balance their double lives.