1. Translucent Skins/Paints
Good: Well I know it was said before but yes, this would make creatures and maybe even windows on buildings looks a bit more interesting and realistic. Digging through the .package files must at least contain a setting for this.
Bad: Well for one, this would mean that you would see some mess ups in buildings through windows. Also Due to a alack of a real skeleton on creatures if a whole creature is painted it would look like it was boneless. Also I remember Void was working on some creatures textures a long time ago...
2. Fur
Note: I found this in #406A0200
Spoiler
Note: The Files have been confirmed to be irrelevant for it so I guess the best thing would be to make a fur part.
3. Cell 'Quests'?
Yeah seems like a long shot but in the cell.locale package i was looking at the stage and found Some things showing Some '[NOT IN USE]' Quests....
Spoiler
I Realized that we can get darkspore things in spore. But Maybe push it further than just parts. I know darkspore has blood, and personally i like the effect, I think there is a package containing the blood files and I was wondering if it were possible to fin it and mod it for spore. I'll see if I can find the file but it may take a while
Well that's all I have for now. I may find some mroe thins as I look into more packages. But Yeah... Enjoy