Great work with these mockups!
For what it's worth, earlier today I queried the art leads about whether we might be able to horizontally stretch the Raptor NPC configs to bring back a little of the character's girth.
To transparently paraphrase our animation director's reply: "The issue with resizes is that the feet may slide when walking, as the animated stride length will be different relative to their leg length. It may not look too bad if a small resize value is used, but preferable to avoid if possible."
Unfortunately, while we do have the capability to do that, our art director also isn't comfortable with using resizeh to resolve this.
I was able to get a little time from an animator to adapt the Raptor's original idle pose to work with the new Raptor model. https://twitter.com/JagexStu/status/1681318551767093252 I'm hopeful it's a step in the right direction.
Fixing what's within my power to fix, I've also replaced occurrences of Raptor examines "Who could move in all that armour?" with the more commonly used "A mysterious warrior clad in thick plate armour."