FWIW, I read on Wiki about the BOk tower and it says that John Williams vision was two 25 story towers to resemble WTC 1&2 but having double the expense in elevators made him go with a single tower.
I can see the bait and switch tactic, wouldn't surprise me at all. I will say that if it's built to it's proposed height you'll be able to know where OKC is from just about any direction, much like the giant cross in Groom TX. It's only 200 feet tall and I've spotted it at night from almost 20 miles away.
I looked up the renderings for the tower in relation to the proposed new arena and also see that it sits between the existing arena, the new one and the ball park and right off Bricktown, and none of the projects are reliant on the other.
I wonder if they will have motion sickness pill dispensers on the upper floors for windy days.
Actually it was just the original designers' idea for it to be two 25-story towers that straddled Boston Ave. As the story goes, John Williams looked at the model, picked up one of the towers and stacked it on top of the other and said, "let's do it like this instead" (Or something along those lines). So I don't think it was about the extra expense, I think it was just that he wanted one really tall building instead of two shorter ones.
As for the windy days, I don't think it will be that big of a deal. I've worked on the upper floors of the BOK Tower for 15+ years. The building most certainly sways in the wind... you can see it often because the blinds will gently sway back and forth... on really windy days you can see the water in the toilet bowls moving a bit.
But in those ~15 years there has only been maybe 2-3 times that you could literally feel the building move; and it doesn't feel like you're on boat or something... it's just a very odd feeling... it's hard to describe really. I never felt sea-sick though, and I'm someone who will ALWAYS feel sea sick on a big boat.