But you would think that all of us running 87 octane would be experiencing knocking due to the engine being poorly tuned for that but that is not the case. For those of us not experiencing knocking, going to a higher octane without a tune optimized for this fuel, simply running premium would lead to marginal gains at best. These vehicles aren't designed to detect the octane and adjust the timing accordingly. Here's a pretty good summary on the octane vs timing subject.I think that (at least part of) the argument is that the Focus is the opposite: a car set up for premium that will accept regular. I can buy that, as no one purchasing a Focus would expect to need premium fuel.
Still, the rest of your explanation makes sense as it pertains to the DPS6, and just goes to back up the idea that using premium doesn't magically fix the problems inherent to the DPS6.
I'm sure Ford would love to come back to consumers and say they just need to put in high-octane fuel.
It has been said that the DCT problem has already cost Ford $3 billion so after all this time and money spent trying to address it for the least amount of money, if there was an inexpensive solution such as changing which fuel you put in it (which anyone with this problem would be happy to do if it did indeed fix transmissions), they would have come out with that and we wouldn't be where we are today with all of this.