The Medic class will have some additional responsibility than it has in the past when it comes to Battlefield 1. As you'll learn in Westie's video, the engineer class is no more, and now Medics can be mechanics as well as healers. The upside is the Medic now becomes more versatile. The downside is the versatility comes at the cost of an additional first aid kit at times which can harm your healing ability.
Learn about the rest of the changes in the video below.