"At least The Donald picked a running mate to give the GOP ticket some balance."

Delusional thinking.  Trump as no interest in balance.  His ego is far, far too big to share any control.  To Trump the concept of a VP is irrelevant since everything revolves around the Trump brand.  Pence will be relegated to the back seat, attending foreign funerals and such.  Like most VPs.  

The selection of Pence is merely a political calculus.