So I was checking out the game’s current mods on Nexus and I found this post:
Nordic Muscles - https://www.nexusmods.com/oblivionremastered/mods/214
Teslov figured out how to modify character models without a specialized tool and created a tutorial on it. It looks like you’d need some basic know-how of the Unreal Engine and Blender sculpting, but seems simple enough. Modelers, like coldsteelj, can actually make chubbier character models for the game now.
Admittedly, I know how to sculpt in Blender and could probably make something myself. But I tend to be a horrible procrastinator and I rarely release anything because of it.
I should also mention that the game has cloth simulation now, so jiggle physics might be possible as well. However, I’m not completely sure on this one since I don’t know how Unreal operates.