"... and what about any Other Ponies that she teased, picked-on, or just plain made their lives miserable, she would still need to make amends for all of the Other bad things that she did in her true life, heck even Twilight had to make amends with Moon Dancer, so basically Sunset still has plenty of reasons to move back to Equestria, I mean she pretty much just ran away from all her problems when she escaped into the Human World so long ago... "



You have to remember that Sunset burned a lot of bridges when she left, for starters. As for how'd she mend them, "Amending Fences" and Forgotten Friendship" has given us literally two in-canon examples of exactly how she would make up with those ponies, and in both instances the offender in question (Twilight in Amending Fences, Sunset in Forgotten Friendship) didn't have to move home to restore her bonds with those they offended (Moondancer, Celestia).



"How about a reason like returning to her Blood Family, her Pony Mom & Dad who gave birth to her, they probably worry about her Everyday since they have no method of communication to reach her in the Human World, and if she had any siblings they probably miss her after not being able to see her for many years..."



Again, this is easily rectified by crafting another trans-dimensional journal, as it seems by the events of "Movie Magic" that making one is apparently an easy feat. They'd just have to make a new one for her parents, and there, pipeline to the fam. Also, there's that pesky portal that's now open 24/7 that either Sunset can go visit them or her parents could even be escorted to her, but yet... either this means something has happened to her parents (her parents are dead like Applejack's) or even knowing she's still out there they don't care, or maybe they were such bad parents Sunset herself wants nothing to do with them.



"...and since she discovered that there is more than just ONE portal connecting the two worlds together, she's starting to realize that She wasn't the Only Reason why there is Equestrian Magic in the Human World, so she's probably feeling less guilty about that whole "bringing Magic to the Human World" thing, so with fewer weights on her shoulders to bare, she has less things holding her down to the Human World, which would make it less of a massive deal if she returned to Equestria, and if they ever bring in Sunset's Human Counterpart, the Human Mane 6 could teach her about the Magic of Friendship and have the Real Human Sunset work on taking Pony Sunset's place on the team."



Except they have stated on multiple occasions she was the DIRECT cause for Equestrian magic coming into the human world. If not for her actions, there would be no actual magic in that world; any Equestrian artifacts that had already been there, such as the Memory Stone, would had still laid dormant without her bringing the crown of the Elements into the human world it reacting to her negative emotions, and then subsequently allowing Twilight to pull power from it in kind to stop her, irradiating the HuMane 6 with magic, which set the Dazzlings in motion (the Dazzlings actually used an innate psychic power of their race, and NOT Equestrian magic, thus the reason they were so surprised when they saw Equestrian magic in the human world at the start of Rainbow Rocks), which of course leads to Sci-Twi noticing the "anomolies," which of leads to Friendship Games and the battle between Daydream Shimmer and Midnight Sparkle, at one point the horse statue is destroyed and causes the CHS portal to leak more magic into the human world. Basically, everything magic related in the human world has been proven to originate because one bacon-haired unicorn brought a magic crown into a universe that previously had no magic, and then USED that magic crown. The only counterargument is "What about Clover the Clever? Didn't he come to the human world over 1000 years ago to hide the Memory Stone? Wouldn't that bring magic to the human world?" Now, if Clover the Clever had used the Memory Stone in the human world, this would be a different story, but he only hid it there. Based on the narrative we have had so far, what was necessary to get magic to the human world was an Equestrian USING an Equestrian magic through some sort of means in the human world. Clover didn't fulfill these prerequisites, but Sunset did.



"That's going to get to her to the point where she would get homesick..."

"..and the fact remains that she was Born a Pony, so even if she is stuck living in a Human Shell, she'll Always be a Pony on the Inside..."



Again, there's that pesky always open 24/7 portal at CHS, but yet after she stole the crown she's used it a grand total of what, two times, both times she wasn't exactly peachy keen on doing it, and she has difficulty readjusting to pony locomotion (just recall how long Starlight watched her try to walk on two legs before Sunset remembered ponies were quadrupeds). Even in the recent special, until Princess Twilight caught her, all Sunset wanted to do was get herself and Twilight & Rainbow Dash the hell up out of Equestria and back through the portal in the castle. This in many ways goes back to the root of what I've been saying all along - Pretty much everything that has been good in her life has happened to her in the human world. She found friends, a purpose, interests, whereas in Equestria she was just snide, petty, and arrogant. It's hard to claim you have a reason to go somewhere just because you were born a certain way. That's much the same faulty logic some use against transgendered people, saying if they were born a certain gender, nothing they will do will change that. Sunset may have been born a pony, but she may be more herself as a human now.