Think like a game developer...before that u were also a gamer,u still are.You love FPS genre and when u find a game u like u go "Hey,i could change this and that and the other thing and add some innovations and bingo,something i (and hopefully more like me) would appriciate and love it for it's new style".
Comparisons tend to become boredom but can be discussed in a creative mannor from us,our thoughts can also ignite something new for the Devs.
Creating something entirely new is very difficult,if not impossible,we are at 2011 now,so,parthenogenesis does not exist i feel.
Taking something old and change it with a refreshing view and different perspective is creating something different and new.
Keeping the aspects that have positive impact on the game and taking out the negative ones,that's what Brink feels like.
All remains to be seen ofc.Good luck to the game