DICE managed to fix the roofs on Siege of Cairo, but little do they know that they inadvertently made every single roof accessible through the drone exploit, thus rendering almost every Rush, Breakthrough, SQDM, TDM, and King of the Hill game absolutely unplayable due to the excessive number of exploiters.
I'll assume that you don't even have a clue how they do it, so I'll explain. When you get on a drone and slap it with the hammer, it jumps 2-3 meters up, and this can be repeated to no end, thus giving everyone roof access across all the maps.
Please get your dookie together and roll out a quick hotfix before it gets even worse. The more people unlock the drone, the worse it will get.
Edit: My thread was merged with this one it seems. Lol