Here's footage of the demo they released, including the Jeanne/Vergil-esque boss fight:
Most impressions, including this video I linked, have called it a hack-and-slash with 'summon' systems and cinematics similar to FF16. She doesn't even have 'stamina drain' when running or performing slashes, the only thing that uses up that secondary bar is when she uses a summon.
I'm not trying to argue, I'm just trying to figure out what soulslike players are seeing in this that suddenly puts the game in an entirely different subgenre of action. The evidence is stacked against it being a soulslike, so if it's just one thing like an estus flask or moveable camera or something, that's simply not enough.