Yo I just beat this a couple of hours ago, and had a wonderful time. Game is relatively short (not so much for its genre I guess), it took me 7 hours to finish the main story with many side quests completed but not all of them (maybe 70%?), but there's tons of side quests (jobs) to unlock equipment, moves and make money. Beating the game takes you into NG+ where you can play as any of your party members (you can only play as Kunio in the main story) and apparently there's extra content in there too because I'm missing a couple of character profiles despite fighting every optional boss in the game.
Multi player (up to 4) is only avaible in battle royale and dodge ball modes as download play.
I read critics calling it repetitive, but I don't know. There's so many extra bosses (all of them callbacks to previous games but you don't really need to be familiar with them to enjoy them), hidden stores, funny NPCs, and missions to keep you busy. There's an absurd amount of unlockable moves too, I'm honestly impressed by the amount of stuff you can pull off during battles. Oh, and the dodge ball mini-game is actually super fun, I imagine it must be great for multiplayer.
Basically I thought this was gonna be more of a treat for fans than anything else, but the game is so hilarious and fun that I'd recommend it to anyone that's interested after seeing footage. It keeps the spirit of the original but refines the formula to surprising degrees at the same time.
Also for more comparisons, this is basically an open-world, better balanced Scott Pilgrim game with a japanese high school delinquent coat of paint, I know it may sound silly because SP was based off RCR's gameplay anyway. If you liked the SP game then you owe it to yourself to play this.
