For the wireframe view, it's these commands:
sv_cheats 1
gl_clear 1
r_drawskybox 0
mat_wireframe 1

It really is pretty cool to watch particles and projectiles and things in wireframe view.

Getting a PoV demo to play back from a camera location other than where your first-person view was when you recorded it is tricky... the demo window (shift+F2) has a "drive" button that lets you manually control the camera during playback but it's very fiddly. Things that you couldn't see during the recording probably won't show up, and all the sounds/screen overlays and even stuff like the camera offset from ducking still get applied as if you're in first-person view. It's a bunch of hassle, and it's generally far easier to get good third-person footage through the replay system (which uses SourceTV demos that record everything regardless of perspective). But of course Valve can't be bothered to enable replay on their official servers anymore...

Dude, I'm a neophyte relative to much that you do in your analysis. I was particularly intrigued by your wireframe/top view playback. Did you simply use console commands? Or is it more complicated?