I'd like to see new content, as well as more sections of menus.
Submenus such as "Assault rifles", "Snipers", "Shotguns" (what gun types there are now) would be great to categorise weapons when more are added, and more guns like mac10, some sort of revolver for secondary, mp5, a semi-automatic shotgun, maybe even attachments (scopes/sights, grips, grip alternates such as GL attachment), lasers (to have some sort of non-sight aim guide) and maybe even something as simple as armour as another extra.
I'd also LOVE to see LAN play. That would be amazing. Like CS1.6, this is one of those games that's so funny because it's so rage-intensive