I think the opposing gangs will all just go that way and won't use other entrance (which is a big pain the ass, why would you go that way if you could go the way shorter way?) if an extension would be added , it needs to be a looooong extension or what's the point of the other entrance?, unless that too is redesigned.

IMO gangster zone and guerre are the most boring bases due to their size and location, they get very little traffic compared to the other bases...maybe making them smaller and adding "more" things to do around them would draw more attention