Every game is repetitive, it comes down to whether the repetition is entertaining. It wasn't for you but for a lot of people it is. It is trending downward according to Steam stats but it still has around 60-70k concurrent players during the low points and in terms of hours played it's be in the top 10 games.
Personally while the overall mission structure is "repetitive" I think the randomization of mission parameters, how the mission play out and the spectacle make it very fun. I would still be playing if not for the Sony shit. It's a great game to peace out with friends.
More stuff is coming / is already out. It's actually a really well done implementation of a live service game which I never thought I'd say about anything. That does mean it has a shelf life though and the live service won't last forever, which is a bummer. I'm curious what they'll do with it once they're finished actively managing the war story. Maybe hand it over to an AI in 2-3 years.
Hmm well I played on and off for about a month and didn't notice anything new.
Do you know if they plan on adding some new game modes? I'm already sick and tired of the whole "shoot bugs, rescue hostages/blow up objective, shoot more bugs then extract" thing. I get that a lot of shooters have a tendency to only have 2-3 game modes max, but those games at least have PvP to keep things interesting.
Not sure. I do know new creatures are planned and coming, and player vehicles are planned. I haven't played in a couple weeks though so I'm not sure what all is out and what's still cooking.