Hmm I only played Bioshock 2 and I liked it alot (Hard to be dissapointed in similarites to the first if you've never played the first)
I'm not sure I like the look of it... No decaying rubble, No water outside and inevitable leaks in an underwater city (Water + Electricity = Fun) and a freaking sky city... My least favorite kind of city ever...
People need to stop with the sky cities, they always contain the same things, lack of freedom (Usually can only go through corridors, unless you can fly...) "Bottomless" pits and retarded platform jumping throughout the entire city to make up for the lack of ever being able to go out of the city... Also the background is usually awful, just clouds and a clear blue sky with the occasional distant land...
I'll keep an eye out to see what the city is like and what changes there are to the game (Such as actually needing to swap plasmids rather than being able to go through with just one or more variety in weapon upgrades)