It could be a good idea to keep the V1.5 version and only upgrade if you bought the new OM-1.
One reason is for the version I have they do not have support for Oly RAW files and they did not provide a plug in. I must say that since I switched to mirror less and Olympus. I use Lightroom occasionally when I need some of the tools it offers. It seems to handle all the post processing I need to do for a given project. My next phase is usually to do any further editing in Photo Shop elements. It also is a good way to organize my photos to easily get back to them. Also, since my primary format is in RAW it is the gets me quickly and directly into the format I want to work in. I find usually gets me easily through the preliminary adjustment. My work flow has always incorporated the camera's software.
Is there an advantage using Workplace over Lightroom that I don't see? I have one Olympus camera and two of another brand.