Simply put, he needs more playing time. If that means giving Stubbs a day off, Bruce a day off or Gomes a few days off, he should absolutely be getting more starts.
Yes, the sample size is small, but he's already been about 1 WAR. He's had 5 HRs in 75 PAs. He plays amazing defense (the catch tonight in RF was incredible). He was practically the MVP of the game with that catch and his home run (or runner up next to Phillips).
I'd love to make him the everyday LF. Can you imagine an outfield of Bruce, Stubbs and Heisey? They'd run down every ball hit out there.
I'm just saying, Heisey deserves more playing time and I hope if the Reds do trade him here at the deadline, they don't sell him short. He's not an elite talent, but he has value and I think Dusty doesn't utilize his talent enough.