The reason GaoLigator isn't GaoDile is because GaoDile is actually Evil, rather than just corrupted.
Had its set been produced, we would have gotten GaoDile (Red GaoLigator with shoulder cannons), GaoJaws (the Shark mold with flipped ports so it's the left arm), GaoHammer corrupted (the design art is just GaoHammer, but I see it as a pickaxe-like head) and GaoBat corrupted (forms the head).
It would've made a nice counterpart to the next fully designed set, which was a Manta Ray, Boar and Bat, as well as adding unique story value.