PC Zone is offering up their own interview with BioShock creative director Ken Levine, lead programmer Chris Kline, and lead designer Bill Gardner.
The final boss battle was somewhat anti-climactic too.
KL: I think that was a question of not knowing thyself enough. Where we were bold enough to include that Ryan scene, the expectation at the end is that this is a big boss - the guy who's been taunting you - so we're gonna jump on his head, shoot him in the weak spot and he's gonna die. So we defied convention with Ryan and then played into convention's hands at the end, and I'm not sure that's who we are.
But on the other hand we asked, what is the audience going to want at the end of this thing? And I think we should've had more faith in ourselves and done something more radical.