Quite an imagination you have there Freddie!
IF Setterfield [and all of the laughable derivatives of it] were true, the universe could barely have expand AT ALL in its earliest "days" because Setterfield's "theory" requires the universe to be many orders of magnitude more massive than it is now in its earliest days. So massive, in fact, that it would have contracted when it was just a few microseconds old [that's in your fake, "dilated" time. In real time, it would have come back together within a few hundred years of the Singularity.]
Why? Because E=mc2, and if the speed of light was significantly greater in the past, then all matter would have been significantly more massive in the past. And, by the way, as that matter lost energy [because c was decreasing] what happened to the energy? Or, in the [literally] magical world of YEC, is there no such thing as conservation of energy, as well?
There are so many other inconsistencies in the YEC time dilation model that it isn't even worth talking about.