...I find it worrying how many people are lamenting the loss of Dead Space as a 'survival-horror' when from day one the franchise has had one boot planted firmly in 'horror' and the other in 'action.'
Seriously, Isaac is too responsive and powerful from the point that he initially picks up a Plasma Cutter for the game to be considered 'survival horror.' Sure, the game started leaning quite heavily towards 'action' with the second, but that came across as more of the natural evolution of the gameplay and Isaac himself as a character. In the first Isaac has no idea what's going on or what he's dealing with and thus the atmosphere is suitably tense, in the second he's much more familiar with the Necromorph threat [small](to the point that he explicitly states that he's "had a lot of practice" in dealing with them [I may be paraphrasing a bit here] in the beginning of the game)[/small] and so greater emphasis is placed on the action, and by the third he's already single-handedly wiped out entire Necromorph infestations twice before and thus, quite logically I might add, any paralysis-inducing fear he, or we the players, may have felt from the Necromorphs is going to be understandably minimalized by this point in the story knowing that we're playing as a man that has literally or damn near literally single-handedly completely wiped out two seperate extraterrestrial undead infestations with naught but a fucking power tool that has had its safety limiters disabled [small](I realize that at least one actual military-grade firearm is available to the player in the original, three in 2, but Isaac has only ever canonically been portrayed as using the Plasma Cutter, and very briefly, the Javelin Gun, one of which is a mining tool with the safeties disabled, and the other a surveying tool with the safeties disabled, neither intended to function as an instrument of death)[/small].
If the games did the Resident Evil thing and switched protagainists with every major installment I could see them maintaining the tense atmosphere for a while, but when you've got the same guy taking on an entire space zombie apocalypse all by his lonesome, twice, and both times coming out quite victorious... Well, it'd actually be quite illogical of them to not place greater emphasis on the action with each consecutive installment.
This is all assuming you don't play on the harder difficulties, or course. Zealot, Hard Core, and Impossible all arguably shift the game into survival horror mode, but I have no desire to get into that right now.
All that aside, haters gonna hate while the rest of us are going to get this game and enjoy it for what it is - an action-horror with much of the emphasis placed firmly on the action side of things.