1. She tapped into the Force ... if you grant Luke using the Dark Side to win, this really shouldn't bother you. It is hypocritical.
2. I hate when people say "Multiple" when it is 2. It was twice, once before the blast shield, once with the shield. And the rest of this is just your head canon.
3. And Rey doesn't beat Kylo ... the chasm does. See? Stupid argument is stupid. Luke didn't lose to the dianoga, it runs aways ... he was attack yes, but we have no idea beyond head canon whether or not Luke was going to survive it's attack. He did manage get above surface once, it is possible he could have gotten away. Anything here is pure speculation.
4. Again, that's speculation.
5. Vader holding back therefor Luke doesn't win ... but Kylo holding back means Rey wins ... do you not see the hypocrisy in your stance?
6. You have yet to show remotely how Rey is a Mary Sue and Luke isn't keeping with consistent logic.
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4 years at most. Estimates have it as low as a year.
https://en.wikipedia.org/wiki/Change...s#Title_change
Officially, 4 years per Lucasfilm. Just to note, this does leave it open to being earlier, official word doesn't mean it is confirmed.
And Lucas always wanted a subtitle, but the most he got was to be allowed to called Episode IV ... marketing people didn't want confusion since it was the first movie in the series. At least that is some reports I heard, so who actually knows what really happened.
Purist view isn't so purist.