First off, I’ve been watching this season, but for some reason didn’t dig up this thread.
Second, amazing that we had not 1, but 2 people make it and complete stage 4.
Third, they had to climb 75 feet in 30 seconds? Okay, did it look to anyone else like they were getting help from the rope on their harness? It seemed in tension the whole time, and those guys were practically levitating. I know, I saw the America vs the World last year, and both of them scaled quickly, but this just seemed magical.
Fourth, Isaac had the call to go first or second. He chose second. Was he counting on Geoff still being worn down from his later run to give him an edge? Was he hoping for the advantage of knowing the time to beat? I’m not sure it’s much of an advantage in this run - you’re climbing for your life, as fast as you possibly can, there’s no real complexity, so it’s not like you have more leeway, right?
Anyway, I think he made the wrong call. Yes, he won the million dollars over Geoff, but Geoff is the First American Ninja Warrior, and there’s no taking that from him. And Isaac himself said it wasn’t about the money, so then why did he go second? 
Anyway, Geoff gets my nod for most impressive contestant, for coming out of nowhere, making the city finals look like a cake walk while it fried out some of the best, and then stormed through stages 1, 2, and 3. And man was it close in stage 3, where I think his lack of experience on the Hang Climb was the biggest factor. He came so close to falling off the last jump when the bar hit.
As far as the contest, I think the caliber of the top crew has improved. Several of them have built or work in or train in Ninja gyms or obstacle courses. Some of them train for it full time. So while your average entry is still going to struggle, the top contenders are pushing themselves at these specific types of events. That gives familiarity and also conditioning.
And yet the winner was Geoff.
Anyway, as far as the pacing, I get tired of the sob stories, and especially the repetition - every time that contestant is on, we hear the story again. Ugh.
I HATE the also rans, the fact that we see three people get summed up with a minor nod. They were doing it to fan favorites who were contenders, and they were doing it all the way through Stage 2. I mean, come on, you make it to Vegas, at the very least that should qualify you to have your whole run shown. Bah!
As for the hosts, Akbar might be super hype, but Matt Iseman drives me batty, with his incessant grunting. Damn, that’s annoying.
And I absolutely hate previews. I really didn’t need them telling me someone was going for the million dollars, and I definitely tried to avoid any hints as to who it might be. If I know they’re up there, then how do I get excited over their run on Stage 2? Totally crap, but that’s the way TV and movies work these days. It frustrates the hell out of me.
With regards to Roulette Row, there seem to be a couple of factors that made it a real tough challenge. First, if you hit too close to the front of the wheel, you wouldn’t curve far enough around. Second, because of the off-axis rotation, it throws the momentum at the wrong angle to follow the curve very well. That is what made it difficult to launch to the second wheel, and difficult to launch to the platform. The body takes off and you have to redirect, but when you start the redirect, you take your energy out, and then the wheel starts the counter rotation. That’s why, was it Geoff who had to change his grip to go for the second attempt on the dismount? His body was going the wrong way on the first swing, he would have missed the platform. And it’s why people who understood the need to go, still couldn’t get themselves to transfer. They felt the position going the wrong way, so they held on, but that meant they would never get the necessary momentum.
I don’t know if it’s possible to treat the whole unit as a single pendulum. You might be right that they didn’t have the timing down and that canceled their momentum, but it might just be that the geometry would require holding a stomach crunch for longer than possible. The natural body pendulum from their arms is entirely at odds with the rotation of the wheel, and the off axis from gravity robs that source of energy and makes the rotation out of plane. I don’t think there’s a way to get there.
Basically, you had to get the placement and direction just right on the first wheel to exit at the right angle to grab the second wheel, and then get lucky on that redirect to exit at the landing. The ones who did the two-wheel grab had a good strategy if you have the reach. That allows stopping your momentum and setting up you direction for the second swing to depart just right, versus having your body thrown willy-nilly.