I would love to be able to provide the original sprites, the only issue is that 1. I'm not going to be adding any additional poses/necessary assets for them. So they're as they currently are, in a sense. And 2. I don't own the complete rights to those sprites, and I don't want the company who made them to surprise me by saying 'oh yeah you had rights except X Y Z'. They are 'free to use' for commercial projects, but I'm still nervous to use them.
However! I will be assisting with the community who may want to mod the game, and the original sprites are available in a separate project. As such, if people want to mod the game to have the original assets, that'd be doable. I just personally cannot make that content, given it'd double the amount of work that goes into coding the sprites, and the file size would be impacted, too. I also cannot make CGs match the old sprites. ;-; I'm very sorry!