Hey!
1) Reduced crashes: Absolutely yes, these models are way less glitchy than the warmane's one
2) Better models for Alliance characters: Yes, the models are really great for Alliance (as I said, Nelf are a masterpiece, expecially female one :D)
3) with some XYZ patch that can be disabled; does that thing really help? Yes It helps a lot, avoiding crashes in high-populated zones like Dalaran
Screenshot? Sure!