Have you ever played Dynasty Warriors, Samurai Warriors, Warriors Orochi, Sengoku Basara, or those types of games? If you have, then you will have a good idea of what's going on. The main difference is a smaller cast with over-the-top gameplay similar to Sengoku Basara, but with the addition of most - I think it's about half of the cast - characters having multiple weapons. Another difference is the usage of a "weak-point" system where after a certain powerful attack, enemies will become exhausted and you can wail on them until they break out of it or until the indicator is complete and your character will do a critical hit of sorts - it'll also play a tune like in Skyward Sword when you attack enemies. This makes it less button-mashy since Warriors games and Basara games don't have that and you can spend a long time fighting an officer - high ranking units.
Expect the game to be grindy and easily boring since there's not much to games like those besides hack n' slash. Devil May Cry, Bayonetta, Metal Gear Rising: Revengeance, and God of War at least has it where you can try out tons of combos and it feels like a fighting game rather than a hack-fest where you go through thousands of enemies. That doesn't mean it's fun, just don't play it every day or for long stretches like 2 to 3 hours. It's a game to sit down and relieve some stress.
