What a convoluted MESS (some spoilers)
A fan of Bioschock here. Ken Levine, you reading this? SLAP YOURSELF. If you can't figure out a SATISFYING TWIST (like SystemShock and Bioshock 1,)don't promise anything "mind blowing". Because Infinite has the most LAZY, LAZY, LAZY cop-out ending I've seen in a while.
Multiverse? REALLY, Ken? That's it? Well, isn't that convenient! Multiverse allows you to justify absolutely anything, anywhere, be it something that makes sense or doesn't.
What a let down.
Come back with System Shock 3.