WHAT IF: Caboose from Red vs Blue joins the current SMG4 cast and make things better?

So, since SMG4's content has become stale as of late, I decided to bring a question up. It's pretty self-explanitory.

Truth be told, I did see a 3D Fanart of Caboose talking to Meggy which inspired this post. Don't know where I can find it but feel free to let me know where it is.