The removal of friendly fire on vehicles is a terrible change. Where do those pre set loadouts apply? I played a game of Big Team a few minutes ago and everyone had plasma pistols/grenades.
From 3pm to about 9-10pm today (CST here), the Halo 4 "servers" were down. While people could still play, the only loadouts were an Assault Rifle or DMR, with magnums, frag grenades, and everything set to default. This is what we're referring to.