Could we make our own Assualt via Grifball?

Hey.

If what I heard is right, there is no Assualt gametype in Halo 4. Now, this is dissopinting. But, I had this idea shifting around in my head for a while.

Using a custom gametype on grifball could we make an Assualt gametype of our own?

What do you think? Yes? Have you already tried this? No? Please share your thoughts!