So after reading many people's analysis, there are two that I am left with being convinced. And it's a case of either or; impossible for both to be true.
>1: Shuji is RoseLalah's world's Amuro. Evident by the Cosmic Glow flashback re-animation recreating everything except Amuro's face/cockpit shots; This is how Shuji is the pilot of the RX782 "naturally". This also explained how he also travels wherever RoseLalah goes, as he was in the proximity of that first berserk Zeknova, and that Char died. This also explains why Machu says that Shuji may have had feelings for RoseLalah, which makes sense if he is the Amuro of that timeline. The conclusion in this one after the finale means they both go back, fate unknown, as RoseLalah accepts the fact that no newtype needs protecting from one another, and probably won't somehow travel back before the blast.
>2: 1 is false, and RoseLalah timeline IS MSG OYW timeline. Shuji is an unknown entity fairy. After the finale, RoseLalah upon the new realization with the newtype protection thing, goes back to the timeline and in time pushes Char out of the way as per the original Cosmic Glow episode, and her hesitations in the original episode are retconned as her coming to the new post-multi-worldline understanding, and ultimately sacrifices herself, knowing that even if she dies in this MSG timeline, the GQ timeline continues to exist somewhere where her GQLalah can find happiness with GQChar.
A point I am not sure on this is Endymion Amuro's line, suggesting he also have been to multiple timelines and have seen Lalah's death at the hands of gundam too many times. This suggests he (as amuro) is from a MSG timeline, possibly even as a post-CCA Amuro despite his ghost having sleeves suggesting he is from earlier years psychoframe piece travelling the timelines.

Have I been missing anything obvious, and which is more likely, aside from the blatant homages and "love letter" sentiment. Please help me out I am a retard.