@ColColton @LisaK -- Thanks for clarity, so it sounds like Lost Swords is maybe a bit saner than originally thought, if it allowed everyone to share weapons, then that makes more sense. Spine Blade with Ivan the Terrible also makes sense, because Cassandra combined those two weapons in SoulCalibur IV, using the sword from Spine Blade and the shield from Ivan the Terrible, but if all the swords were usable by all of the Alexandras then that was actually kind of cool of them to let that happen. It's still a thing that the swords do have original owners and assigned identities, but with Nightmare getting Great Sword from Siegfried, I don't really like that either
@Noctis it seems weird to have an elegant weapon as a katana (even a really big one) used by Nightmare, but do we have a confirmation that Siegfried doesn't also have it, that they're sharing it? I don't think we've seen Siegfried's full weapon loadout yet, I haven't, anyway. If Siegfried has one of Nightmare's weapons, maybe they do have some kind of fair trade system going on, but... I guess we'll see.
@Crimzin -- From a lore standpoint, I would say it is a big deal. I'd say Fire Blade and Orichalcum are more aesthetically pleasing than Katzbalger, too, so just shoving it in Sophitia's hands instead of giving her one of her mainstays is weird. It's even more weird if Cassandra ends up picking up one of Sophitia's weapons... if it was like Lost Swords, and they could use each others' weapons freely, then that would be more okay, but straight up changing owners of weapons is something that they haven't really done before.
Abelia is an outlier. She picked up Gladius from Sophitia in SoulCalibur II (and it hasn't been seen since), and she did have Katzbalger, but Cassandra's The Ancient was also modeled after Katzbalger, so she didn't actually really lose the weapon, much like Sophitia's The Ancient was modeled after Swordbreaker, so she still kinda had that too. Abelia having Valkyrie was the weirdest thing, where she could have / arguably should have had Swordbreaker too to even things out. The rest of her weapons were unique or repurposed, like Excalibur was Dark Blade with Blue Crystal Rod's shield. Ice Blade was unique, and it would see use again in Legends of all places, used by Sophitia, but then Eternal Rest was unique to her and then there was Hyle's Lilia.
It's entirely possible that I care too much about this, I'll admit. It just baffles me why they would just hand weapons over to different people like this.