Got the game today; here's some quick thoughts:
-You only start out with a few characters available. Some characters can be earned just for finishing a stage (they are locked in cages and must be freed), so earning new characters looks to be faster this time.
-Four main storylines paths are available, and look to be comprised of 15 stages each. You get two stages opened up for beating the first level, and can play them in any order.
-There are no selectable bodyguards from what I can tell. You'll just get whoever happens to be with you on that particular level or part of the level.
-Three armies on each stage...yours, those opposed, and the Orochi soldiers, who remind me of dark elves in samurai armor.
-Stages feel like a fusion of Dynasty and Samurai Warriors levels. You can encounter footsoldiers and generals from both games.
-There are three character types: Speed, Power, and Technique. This affects use of the R1 button.
-The game play has been changed to revolve around the R1 button attacks. Gone are the individual techniques and rolls from Samurai Warriors 2, as are the arrow attacks from Dynasty Warriors. Instead, depending on his or her character type, the R1 button used in different combinations with the combo system will produce NEW character specific attacks and abilities.
-You choose a team of three characters and can switch between them at any time, except when on horseback. Each character has his or her own life and musou meter. You can choose any character you want to play as after each level.
-You no longer get musou by killing enemies. Instead, switching your character out will let him or her charge musou to max and heal completely. This is likely because...
-...The difficulty is HARDER than all the previous games. I was getting my ass handed to me on normal on the first stage for a good while before I cleared away all the enemies; there's more characters that show up on the screen at the same time (with no slowdown, amazingly enough), and they can really let you have it. It's a welcome change.
-You gain character experience which can be individually used to help level up characters inbetween levels. Characters also level up during game play as normal. Weapons and abilities can still be found as well.
-The music is easily the best out of any Musou game, period.
-The speed feels a bit faster to me than previous games.
That's all for now. So far, I am absolutely loving this. The only thing this game needs (unless it's there and I haven't earned it yet) is a team-based musou attack. This game is automatically awesome and is a must-buy for anyone who has ever liked a Musou game.