I don't know how much it costs to develop a game these days, but I'm sure the budget for these two titles is well into the millions. I can't believe actually saying this, but appealing to a bigger fan base can be a good thing.
DX:IW didn't appeal to a bigger fanbase. It appealed to the fanbase of "I like to play crap". I am much more excited about this game after reading the preview at IGN. Now granted the textures don't look the sharpest, but this is due to bloom, or a mildly dated graphics style (Something the series is known for). Lets just cross our fingers (I hope the first mission and training session come as a demo. The first two games had great demos and this game should be no exception).