1:The Normal one's can be put on dead bodys to re-ainimate them, but they act as a Fast Zombie in a way, just not the same speed and movement ability.

2:There could be diffrent types, like one type could be for Antilions, ect.

3: A sort of Factory, it would be like a wave system, each wave getting harder and Harder, this could be good for Servers for events ect.

4:The Full trainsformation, instead of it just changing the Material and such, how about it turnsthe Body into a full Mech like Creature.(I know this one and Number THree would take awhile.Since you workeed on Bio-Anilation, you can proably do #1 Easily.)The Size of the NPC/Player would Increase and the Health would be Around 400, along with 150 Armor.(Note, trhe Mech is For Mark I and II Mark III basicly becumes a Mini Version of an Advisor.)Those are my ideas.I know some of em will take abit but take yer time my man.