Keep the beard. It makes him look more like a terrorist jihadist.
The fact that they are trying him on “Work Place Violence” pretty much means his punishment will be less than if they tried him on a domestic terrorist charge.
He is being tried on multiple charges of murder and aggravated assault. The "workplace violence" nonsense is what President Obama called it.
Under the charges and specifications, the death penalty can and should be imposed. I shall be surprised if it is not. Whether it will withstand review by the convening authority and then by the courts is a different question. It should, but may not.