I agree with your point that Metru Builds can have interesting parts usage, but I don’t think using Dark Hunters helps the case (especially Ravager who’s just a mishmash of other sets, the legs are barely modified from Nivawk). Better examples of interesting parts usage on Metru builds would be things like Kodiak’s Bomonga, which has a Metru torso and could conceivably be a Toa, yet makes creative usage of several parts
Toa Hagah Bomonga - Creative Content / Lego Creations - The TTV Message Boards (ttvchannel.com)