Smaller maps means easier spawntrapping, faster gameplay, and you don't have to take the time to learn how to shoot accurately at long ranges. You can thank YouTube for the obsession of small maps.
The smaller the maps the easier it is to find 100 people to kill, the easier it is to lock down spawns as they're limited and closer together, and the easier it is to effectively use SMGs. Small maps means you can get anywhere you want in a shorter amount of time and we all know the obsession the gaming "elite" have with fast paced action.
I for one don't like small maps. I think it takes skill and strategy and replaces it with chaos, which to me is a something I find daunting and boring. However, I'm not selfish enough to know that's what some people like. So balance is key. Small maps should honestly be left to TDM and KC type modes as objective based games on small maps breed exploitation. Nuketown for instance is small and was popular solely because it was easy to rack up hundreds of kills due to broken mechanics.
Personally I think the smallest map size should be what we now consider medium. Increase map size, increase lobby size. Eight player teams playing what we consider medium maps would, in my opinion, resolve many issues people have with the game. There's more ground to explore so spawntrapping will be more difficult as spawn zones are larger. More players mean you can kill just as fast.
