So I just played the XBox 360 demo, resources drop left and right and I doubt you're going to be compelled to buy any resources from the store unless you truly abhor replaying levels for resources (which you had to do for credits for all the upgrades, by all accounts, in previous games).
I'm also not a huge Dead Space fan, but it didn't seem any more or less "scary" than any of the other ones.
So as usual, it seems gamers are just being shrill and annoying on this one. With that said, the game could still turn out bad, but there seems to be no reason at this point to expect it to be bad.
All I just read was "boo-hoo we don't get a hi-rez, PC only texture pack!"
That's the norm, games like Max Payne 3 are still the exception.
Mouse and keyboard support already implies rebalancing the enemy AI and possibly other stuff, it's not just a big, "well duh!" like you're making it out to be.
EDIT: You know what, I am not fucking done yet. I am pretty sick of the gamer hypocrisy, too many bitch, whine and moan about the budget it takes to develop new games, about the insane profit sometimes needed to make money, and about the price tag of games and DLC. They THEN turn around and fucking bitch that their favorite platform isn't gonna get some special snowflake god damned treatment which costs more to test, develop, etc. If you're one of those people, please have an epiphany and FUCKING CHOOSE ONE, you don't get both!