It wouldn't really bother me deeply as there is hardly a lack of FPS games at this moment in time. Should they go away for a few years and let the FPS wave recede from this high water mark it seems to be at and then returned, I think that might increase interest in the series overall. It isn't that the series is particularly bad, per se, it's just "more of the same" right now and has been "more of the same" within its own framework as well.