In infection, on the big team maps, there needs to be speed demons. Not braaaaains. Also, the hideout on the pit in the sword room is horrible. In halo three the wall to fend off the zombies was indestructible. Now it is basically useless.
In general I think a lot of the Halo 3 map/gametype combinations need tweaking.
Also spooky house really needs some tweaking with the zombie spawns. The humans can camp and pick you off mid air before you have a chance to infect anyone.
H4 needs to stop appearing as much and H2A should show up more. As for the H3 variants I would be all for it appearing in different orders in each map rotation.
I strongly agree.