I find that most of the time, unless your marshal is incompetent (which is a whole other discussion), vice marshals don't get much to do mechanically, and I think that is why most end up not doing anything. It's up to the marshals and generals to tell the VM what they expect of a good VM.
Even more so, most people, even in the army, don't even know who their VM is. Thus, it seems almost awkward and questionable when all of a sudden a regular knight starts sending out orders to the army. People second guess it since they lack a title of VM in their sig. It's like, "uh, should I actually be following this...? I think I'll just wait for orders from further up..."
