I wouldn't necessarily consider a chicken cheesesteak healthier than a regular cheesesteak, other than the fact that chicken is leaner and provides a bit more protein. If that's what you are looking for, then sure! Otherwise, the additional ingredients such as cheese and the bread roll take away from it being an overly healthy meal altogether. To keep it lighter, you can place the chicken mixture in a bowl and enjoy it as-is without the extra carbs and calories from the hoagie roll.