The PC gaming community is larger than it ever was before. PC FPS titles do just fine and I haven't heard of this "no one wants to play FPS with a keyboard/mouse anymore" bullcrap. If anything, most people who've tried both tend to agree that keyboard/mouse is superior.
Hey bungie, no one wants pay-to-play premium games anymore. You should make your title free to play. You're so behind the times... le sigh.. ;)