The most significant shift is that the Robo-Legends are now aware of what they are rather than being tricked into believing they are the originals.
Why spend all that time showing that Robo-Sara had the potential to break her programming by questioning the fact of her existence and what she was being made to do by Evil-Gideon? Robo-Sara gets very little coverage in this episode at all with her only use being as a blunt instrument to inflict violence on whoever Evil-Gideon decides deserves it. It’s entertaining but it’s lacking in depth which is unfortunate considering there was an entire episode devoted to characterising the duplicates to varying degrees. The Robo-Legends are less characters and more cannon fodder taken down one by one in really creative ways. It’s as fun as fans of this show have come to accept but it’s also unfortunately very shallow.
The majority of this episode deals with the Legends taking on their robot duplicates. Considering most of the threats they face are either directly or indirectly caused by them stopping may not be such a bad idea. Other than the desire to get home it isn’t made clear if this signals the end of their adventures in favour of settling down and simply living their lives. The present day of the Arrowverse is the same year the shows are made in so the Legends consider that year their native time period. Everyone else is from different time periods though as with many things there is an expectation that the audience won’t question it too much. Previous episodes have noted 2021/2022 as “home” though that’s not really true of anyone outside of Sara, Nate and Spooner. One of the more curious things is that the conversation isn’t around going back to adventuring across the timeline instead Sara’s objective is to get everyone home.