I think DBZBL is taking a step in the right direction, but just didn't pull it off the way I'd hoped it would.
This game has a simple fight system similar to the Budokai games. Each character has two attack buttons, ki blasts, 3 special moves, and can block and dodge. New, however, is the way you use ki. Ki charges automatically now, and basic ki attacks (including kamehameha, etc.) don't use ki at all. Ki is reserved now for Ultimate moves and making basic moves more powerful (i.e. a super punch that'll stun your opponent). There is also a mode similar to the overdrive thing from Budokai 3 called Aura Spark, which just makes you a little more powerful as long as your ki lasts. It takes about 30 minutes to figure out in it's entirety, especially if you've played budokai 3.
The problem with the fighting system is that it's too forgiving. The "depth" it claims do offer is supposed to be found in the timing, but that's out the window because you can just hit the right button ('x') really fast at around the right time and you'll teleport out of and dodge anything they throw at you. Plus, the ability to do specials endlessly means that you'll end up firing Double Sunday's back and forth until you can't stand to hear him call it out anymore.
The other, glaring problem is brevity. The game only has about 20 characters, and 5 stages. Maybe I've been spoiled by Tenkiaichi, but I just got mad when they had the Saibamen, but not Cooler. The story mode only covers the first 3 sagas, and two side plotlines for unlocking Bardock and Broly. The only other modes are time trials and such, but with so few characters, it starts to get redundant. I ended up fighting Frieza on Namek 4 times in a row on the time trial.
The story's not there, the characters aren't there, the unlockables aren't there. The fighting system isn't terrible, but not good enough to warrant buying the game over other fighters out there. Even if you're a huge fan, I'd wait for the next one.
This is a great fighter with very solid mechanics. The game is very well rounded with only a few minor flaws. I'll start by saying, "I wish they would have tried something new for story telling, it only seems like you jump from battle to battle with little story developing in between." There's not really any flaw in the gameplay, the combo's are butal and extremely fast just like the series and the graphics are indentical to everything you remember, all of this puts you in the middle of the battles. The story goes from the very beginning of DBZ the very last saga of the DBZ series. The game just feels like there's something missing given the power avialible with NEX-GEN consoles, but all things considered this is a very solid game that deserves a play by any DBZ fan.