i don't really see how the gameplay changes ruined it, even if only having two weapons at a time was annoying, and really one of the things I've always loved about games is losing myself in the story. having all kind of bits of fluff to find only make it better, for me. and even without that the storyline will screw with your head in the most wonderful way.
I am really looking forward to the release of the rapture-based DLC, though. that looks like it'll have even more yummy story bits to search through!