I tend to agree with idea that formally assigning Diac the fractional percent ownership of the patent accomplished two things.
Primarily - the removal of any potential objections that could be made by T-Mobile regarding whether (or not) Diac & his Lawyers had a standing to sue.
Secondarily - a signal of sorts that the 28% (+ World-Wide benefits) issue was a non-starter with the Reciever.
Maybe I'm just seeing this glass (such as it is) as half-full by thinking this way? Possibly. But the Reciever would have been just as easily served by stating that in his standing as Reciever (and deciderer) here that the 28% deal with Diac was solid. That would have squelched most objections by T-Mobile as well (IMO).
Keep in mind that Diac does hold a substantial chunk of (likely) legally obtained shares that can't & won't be taken away from him regardless of the decision on what fraction (0.01% or 28%) of the patent he does own.
We get a big settlement or ruling and a big sale on the pantent's value,... he wins bigger than most here just by being among the biggest elephants in the room.