I think the overall vibe you have got going here is great! The only suggestions I would make are perhaps 1 extra subtle highlight on the carapace and the exoskeleton but I can understand preferences in brightness and tone. The only other thing is in the book it says old one eye has a thresher scythe tail but of course it's up to you. It's a shame there aren't more pictures of the head because that looks really interesting and reminiscent of the 3rd edition model. Just opinions but great job regardless!