I always saw Genesect as more of an ant-like creature. I will say the 300 Million years thing has me curious, but I would say I disagree with the assessment considering the body shapes really don't match.
I would love to see an armour-stripped Genesect forme, though.
The only thing that really makes me dislike this idea is that I don't really get where Genesect's Bug-type comes from. Personally, I think it's a Pokemon related to Kabutops and Scyther, but not actually either of them.
Similar to Scyther in that it's a Bug-type known for its speed and being capable of flying, whereas its hunting behaviour and movement is more like Kabutops, only adapted to aerial gliding rather than swimming due to its robotic upgrades. It has some similarities with both of their body types too.