Patrick added this request on my behalf (thank you Patrick).  I will add a few things:

1. I did not investigate what all the side-effects are of setting RenderModule globally, but just hitting a few screens while trying it out had some weird things happening (like javascript errors that weren't there before and popup windows popping appearing when they shouldn't).  Our js wasn't written with modules in mind, so having to do that in an expanse existing project is not ideal.
   
2. It appears some effort has went into getting the viewer to work without modules.  However most of those workarounds have their own bug tickets open.  And the UMD solution that did work for me wasn't very detailed, so if support hadn't bailed me out I probably never would have figured it out!  So having a solid, well documented way to do this without setting RenderModule globally would probably help out a lot of us developers!