“Great” is a relative term. A great slicer will be thin stock and have a flat grind. A Mora can be an okay slicer in the field, but you will never see one in the hands of a serious chef/cook. Using a Mora for food prep in the field is understandable, but it is a compromise to avoid carrying to many different blades.

While at REI recently I found of all things an MSR Alpine Chefs Knife. Something to consider before thinking a Mora is a great slicer.