From what I have played of the maps so far, they are clearly bigger than some "small maps" in previous titles; namely rust and nuketown.

Just doesn't make sense why they restricted them, at least make them playable in TDM.

My gut feeling is even with all the community requesting them to go into the regular 6v6 game modes, they probably won't.  Or at least not for a while.  Doing so would admit that Face Off was a mistake.  Instead they'll blindly continue to promote it, despite what everyone wants because they'll never publicly admit that they're doing things wrong.  From a business standpoint they'll think it'll get people to lose faith in their decision making skills as a company. 

I think what they don't realize is most of that faith is already gone.