I will counter your logic and say the blueprint you point to has been beaten time and time again by all these guys to some counters are incorporated to help neutralize it. So you're arguing a logic that has been disproved by all the movement based fighters till the style you are touting adapts thus making it not the original "MMA style" that beats movment.
It's all a circular cycle of innovation and adaptation on and on.
But to your points...
Yeah, I'm not sure why those guys don't adapt to that basic strategy and work around it. Transitioning to kickboxing from TKD full contact it was all about breaking down why I was getting my ass handed to me and adapting to some of those points you observe.
Low kicks is the first and formost tactic to incorporate. We spend all those years training flexibility, speed, power and timing kick low is so easy and will slow down any fighter or get them to react defensivelly. Part of me thinks ego is part of it, but I don't care as long as it's effective.
We train all that movement but don't design new patterns to mask the straight line advances that can be read. We can study and incorporate angle based movement just as well as the next when we drop the ego and look to the successful examples.
In short all your points can be analyzed and patterns incorporated to adjust to them as well as keep the movement and final techniques.
But then that's the cycle of innovation and adaptation.
It's not really that the style adapted and wasn't the original "MMA style". I don't know why you think that exists. MMA has a vast range of styles. What really happened is guys like Machida came in with years and years of experience in striking arts, so they beat up guys who didn't start training striking until 3-5 years ago. Then they hit the top level of competition and have more difficulty making the style work because they find guys with enough experience to impose the right gameplan on them.
There are two main weaknesses that need to be addressed by this long range, in-out, kick heavy style of fighter.
1) Defense in the pocket. These guys always get hurt exchanging in the pocket. Wonderboy got dropped by Woodley and Ellenberger, Machida got dropped by Jones and knocked out by Shogun, Enkamp got rocked by Taleb, Yair got cracked then wrestle-fucked by Edgar, Gunni got dropped by Story, the list goes on. To be successful in MMA skill in the pocket is one of the most important things, and if you can't win there you NEED to be able to force the guy to stay outside (unsustainable) or beat him in the clinch. There's a reason wrestlers and boxers have always held the most championships and have been the longest reigning champs. It's not because those arts are superior, it's because they develop skill in the pocket and clinch that allow those fighters to dictate distance and pace. These TMA guys need to find solutions and figure out a way to stop getting hurt in the pocket.
2) Cage cutting. These guys also always end up with their backs on the cage, which takes away their ability to use their excellent distance control and thus ends with them being predictable, easily timed and easily set up. This goes hand in hand with defense in the pocket. These guys need to control distance as much as possible,but understand that you can't keep the other guy outside forever. The answer can't be to back up more, eventually it has to be to find a way to close distance on your own terms, turn the guy and escape back to the center. No amount of anglular footwork in the world will prevent you from getting cut off forever. You need to be punching off those angles, and you need to be ready to step inside and shoot or smother then turn.
As for for tactics, a lot of these guys have tried to incorporate low kicks and not done well. Fundamentally, throwing low kicks while being driven backwards is very risky. Also, throwing them against somebody who's ready to step in and throw hands or catch them is very risky, which guys as usually waiting to do against longer range styles. Low kicking is how Wonderboy got taken down and elbowed in round 1 of the first Woodley fight. The problem with low kicking is that first you need defense in the pocket, otherwise you're just stepping into the other guy's range for a pretty low reward strike.
Angle based movement is a necessity, but again it only gets you so far. Without the ability to fight in the pocket all angles really do are buy time against a good cage cutter. Sure they'll work magic against a Hendricks type who follows you, but not against a cage cutter like Weidman.
So yea, we've seen these guys make it to the top. We haven't seen them innovate to beat a certain style yet. It's time to address the core weaknesses that links all these losses.