I am quite keen to move quickly into the animation portion of production, so these symbols for Death and the other two main characters may well form a reference base to draw from and use when convenient, but I don't think I'll feel too badly about breaking off from the symbols for the sake of better animation.
Another thing I'm keen to get out of the way is the backgrounds, but that's more just because I don't particularly enjoy creating backgrounds so I want to get it out of the way as quickly as possible.