Naruto Shippuden: Ultimate Ninja Storm Revolution is not as revolutionary as the title might suggest, but I think it's the step in the right direction.
The disappointing thing is lack of canon story mode in the game. Instead, we have Ninja World Tournament, Mecha-Naruto Story and the Ninja Escapades. The Ninja World Tournament is just mode, in which you thrive for championship in a tournament consistin of 4-characters brawl. Initial ranks of the tournament are easy, but difficulty rises gradually. Also, you can roam the island (the bigger progress you made in the tournament, the more areas you can visit), doing challenges, missions and events. Even thought it has absolutely nothing to do with canon storyline, the mode is quite fun to play, some friendship events are hilarius.
Mecha-Naruto story is mode, in which you learn the story of the most controversial element of this game: Mecha-Naruto character. Designed by Masashi Kishimoto himself, Mecha-Naruto is machine based on game's tiltular character. His story is rather short, but it explores topics and problems Naruto fans are pretty familiar with. The story has a potential, but the execution is lacking: it could be a much more emotional story.
Ninja Escapades consists of 3 mini-stories: The Creation of Akatsuki, The Two Uchiha and The Far Reaches of Hope, each has cutscenes made by original show's animators, Studio Pierrot. It's a pitty thought, that only two of these actually consist of gameplay. The stories are supposed to be surpervised by Masashi Kishimoto, but I don't believe that: at least two of these stories consists of logical errors. It was the most obvious in the Creation of Akatsuki: we haven't learned of how the leader managed to win against legendary Hanzo the Salamander; we didn't learn of who were the previous partners of Kakuzu, since he is state to be killing them; Sasori's former Akatsuki partner never saw his true form in the manga; Deidara and Orochimaru didn't belong to the group at the same time, much less Hidan and Orochimaru. I could go on.
The story isn't strong element of this title.
The game is 3D figthing-like game, based on Masashi Kishimoto's manga series. I said "3D fighting-like game" because it uses very simple game controls - you won't be fighting your controller constantly. Instead, you'll be making a very simple button combinations (like block + attack, block + shuriken, chakra + jump etc.) and the basic combos are combosed on just attack button and directional pad.
That is not to say that the game is boring and has no substance to it. The gameplay is very dynamic, there are also counterattack, guardbreak mechanics, alongside with throws, "tilt attacks", support characters, cancels and 3 team types. A few of those mechanics are new: counterattack is reflex-based mechanics that causes long guardbreak to your opponent, if he manages to fall for your couterattack attempt, while guardbreak pills are special attack that, if it hits, renders your opponent helpless for a certain period of time, but can be used only twice during the battle and can be easily interrupted.
The game has been rebalanced in comparison to the previous title. That is not to say, that game is perfectly balanced: some developer's decision (I don't mean mistakes) made me scratch my head. It is hower, step in the right direciton: weaker characters were tweaked, slower were speed up, awakening mechanics were rebalanced (no more priority via dashing), some top-tiers characters were nerfed, ultimate jutsus are not doing that much damage when canceled or used on guardbreak opponents, etc. One of the crucial things is separating awakening, ultimate jutsu and support drive into 3 team types, meaning that you can have only one of those things. Some players are saiyng it's dumbing down the game, but I think it's an attempt for rebalancing the gameplay, and it's a factor of choose how you want to play your character.
Graphically, the game is OK. It's faithful to anime art style, and it's good. Music, on the other hand while decent is not very memorable. I can't recall any track from Mecha-Naruto stroy at all.
I didn't have serious problems with online mode, but evidently many people experienced disconnections, crashes, transmition errors and so on. For the time being, it's the serious problems and the developers needs to do something about that, otherwise online mode will be dead. Speaking in online, ranked matches are very punishing if it comest to earning and losing battle points: it's hard to earn them (you have to fight someone of your rank in order to fight be worth your time), but it's very easy to lose them (losing against someone of your rank is as punishing, but lose against someone like 1-3 ranks lower than you and I guarantee you'll be frustrated). Results are, even with 65% winning ratio, you aren't achieving anything.
Despite all of this, the gameplay feels nice and fun, especially when playing against living opponent. But I think that this game is mainly made for Naruto fans, and I highly recommend it to those people. Fans will be pleased to have about 100 characters to choose. On the other hand, fans of hardcore fighting games like Street Fighter or Tekken are going to be dissapointed.
+Rebalanced, fun gameplay
+Narutoverse (for fans)
+Great for multiplayer
+Over 100 characters to pick
+Little harder than other Storm games
+Game balance is still flawed
+Optimalization could be better
+Too simplistic to be likeable for hardcore fighting games fans
+Dissapointing story modes