There is no doubt that Tonberry is the unofficial oceanic server, it's just that most people doesn't "chat" on global/shout/yell as it can be viewed as spam and inconveniencing other players.

Largely dependent on which FC you joined thou, and any active LS that you joined. My previous FC (Mirai) had a few hundred members and the FC chat are generally active. Currently I tend to have more conversations within LS instead - it really depends. Consider joining a couple of LS to make more friends if you like socializing.

However, most people log in to actually play than chit chatting. The Second Coil of Bahamut is still relatively new and thus most people are spending time on progression, got to take that into mind too.