I created a very simple application that will parse the .json file and remove the key frames that don’t change. Making my own exporter/modifying the existing one turned out to be too big of an ordeal. Just download the .exe (sorry mac and linux users, don’t have one) and give it the file. Anyone could also modify it to suit their needs, like I said it’s a small program. I’m sure the Blender exporter will get better with future updates but for now this is a suitable workaround for anyone that wants to mix animations I think.