In terms of the event I had fun with the actual game portion, the maze and trial concept is fun - they should keep adding to and playing with stuff like it (imo). Also it gave me the feeling they could make some bomberman content for the Saucer or an event, especially seeing that YoshiP has some literal experience making those games (not suggesting bomberman should be for valentines, just had a "oh seeing this then I think that could be fun!" feeling).
I was however very confused on how the elixir (item needed to get sword and knife) related to anything and felt it didn't belong, that they maybe just wanted to add a few items to the cash shop later.. or something. Now that the game is a few years old and there are seasonal events stacked upon seasonal events it would be nice if they added a one time grindy quest to earn one previous reward. Perhaps from a list of content 2 years or older, so SE doesn't take away from the pool of people who'd likely buy but also don't make it feel like an ever growing mountain of "tough kupo nut". Or.. if they keep stacking all these housing items behind the wall use that money and make some instanced housing (like Wild Star), please.. I know I have no power here lol, but it would be great to see all that housing related money funded into a future proof housing system (make it account bound instance if it's too much data for each character). An alternative idea is on the anniversary event they make an event to earn a one time from previous seasonal(s), in this way it's one item a year rather than one item from a previous seasonal a year (making it an easier sell to the company).
For the story it was fine, I think on a platonic level it would have been more interesting with two males but honestly whatever not an issue to me besides a vague "would have been different". I don't think SE wimped out making some romance they were afraid to do (maybe they were, but I don't think so). As SE has done it before in stuff. I can think of a few occurrences (like that hard mode dungeon) and it's all been story telling wise and not some self back patting bludgeon telling people how to be or think (doesn't matter on what issue that I agree or disagree, I dislike "let me teach you" bludgeon pieces). So I think they're doing great so far. I'm not worried if SE did tell a story like that next year or whatever quest but I think them feeling like that they HAVE to would ruin the element of smoothness they've done so far (so hopefully they don't feel compelled to, but neither feel compelled not to).