They're getting better, though. Tyrion was a fluke, but do you remember those initial proto pics? Not good. Same with Ned. The proto looked atrocious, but the actual product came out looking a whole lot better. For Jon and Jaime, it seems like the proto has matched the product. The Hound is the first time we've ever seen a proto from Threezero that looks absolutely fantastic. That's definitely an improvement considering every other proto they've put out hasn't been amazing.
But you have to consider Threezero's other recent works. Guts from Berserk: excellent. Rick Grimes: people dog the figure for its body, but the head sculpt is good IMO. Merle: excellent proto. Michonne: excellent proto.
We've never gotten amazing proto pics from Threezero until recently, so they're definitely improving. They're a lot younger than Asmus and Star Toys when it comes to crafting human likenesses, and they're already doing a good job.