This may just be the saddest thread I have ever seen on this website.
There's no problem preferring games to have larger player counts, but acting as though anything that doesn't opt to do this must be due to limitations, and inherently inferior is ridiculous.
I often see people saying they don't understand why people are looking forward to Titanfall, and that it's simply CoD with Mechs. Turns out, as soon as details come across that show there are design choices that separate the game from whats already out there, everyone throws their hands up in panic.
Titanfall has no singleplayer mode, but it has been said that they are adding a sense a narration to the multiplayer in the form of objectives and set pieces. This is something that neither CoD or Battlefield provide, and quite likely requires AI opponents that can be relied upon to perform a specific role in order for these scenarios to effectively play out. These tasks could quite possibly not be things that can be entrusted to human players simply because the average online player is more invested in their individual scoreboard placing, than the role they should be serving on a team. Maybe one of these scenarios is a rescue mission of some sort. Would it be better to have actually human players wait in capture for their team to rescue them, only to possibly be offed seconds after being sprung from prison? I wouldn't think so, that sounds more like a role that an AI is more suited to fill, whilst all the human members perform the rescue. On the other team there may be AI units stationed on patrol, that alert the humans members of the team once they detect the escape route the enemy is attempting to flee from, allowing the defenders to home in on their objective.
This is obviously just a scenario I'm making up and they may not have anything like this in it, but it's really not hard to see how there can be very valid reasons for including AI units in a multiplayer game. A lot of people here seem to be actually complaining that the game isn't just going to be Battlefield with wall running and Mechs... it's crazy.
Also, in regards to player numbers, mobility has been touted as a large part of the game's appeal. If you place too many people into smaller maps, you'd have multiple people locked onto you the moment you respawn each time. This would likely diminish the movement aspects of the game, as you wouldn't have the spacing required to actually move around much, as you'd be constantly engaged in battle. On the other hand if you increased the map sizes dramatically to compensate, you would likely have too many large open areas where you would be unable to utilise your movement options, and would probably get bitch-slapped by any Titan you come across if you're not in your own.
I've never really liked Call of Duty in multiplayer. Same for Battlefield. However, as someone who spent hours a day for years playing Quake 3 Arena, Titanfall is one of the very few FPS games that has actually caught my interest. The movement options are a large part of that, and any design choices that allow for that I fully welcome. Plus, in Quake 3 you could have large numbers on players far above the recommendatios... and it nearly always ended up being a disastrous mess. I would rather not have that scenario become common in Titanfall.