USUM is the only Pokemon game since the GB era I've gotten rid of. I despise the changes made to it and decided that if I ever want to revisit Alola, I'll just play vanilla Moon again. Ultra ruined the relationship with Lillie and Lusamine's entire character and instead gave us a 5-minute loading screen (aka Mantine surfing) and a dull post-game boss rush.
^Yeah, for some reason it never actually mentions marriage, just strongly implies it. It's the same ending for male Byleth, and the other lesbian endings do mention marriage, so I'm not sure why they went just short of it with Edelgard.