I actually have a few complaints/suggestions about the gametypes and settings.
My first suggestion is to pay out more than just first place in the FFA, because FFA's can be more luck depending on spawns, etc. So they best player might not always finish first.
Second, if the 2v2s are going to be played to 50 kills, 12 minutes might not be a good idea. For one, it will cause a lot of camping. Camping will occur because one team might be up just a few kills, and there will only be around two minutes left. Because there isn't enouhg time to reach 50 kills, teams will most likely camp with the lead.
My third suggestion sort of ties in together with some other suggestions.
Iif the weapon set on beaver creak and ivory tower are going to be human, the overshield needs to be on. The reason being there is both a sniper rifle and a rocket luancher on those maps. Without an overshield to pick up, the team with the sniper and rockets will always win. If there is an overshield, then the team without snipe and rockets has a chance to pick up the overshiled and rush/kill at least one of the opposing team members.
NOTE: If you wanted to keep the overshield off, just change the weapon set on those two maps (beaver creek and ivory tower) to rifles. This way the only power weapon on the map is a sniper rifle, so the game becomes more fair, since focusing your fire on the sniper becomes more important, and you dont have to worry about the other guy having rockets.
Fourth, the Sanctuary weapon set should be default, that way there is both sniper and PP on the map, it gives each team a significant choice to make about what weapons to pick up, and if one team has both snipers than the PP are there for the other team to use to ruch the snipers.