Stayed stable for a while last night in the Multi lobby and interacted with a few people and you can really see what they are going for with this. It's a better use of the DBZ license than I would have expected from a game, but I wouldn't be surprised to see many reviewers docking points based on how frequent the disconnects are and general network instability. Shame, but they really need to work it out to have a release like this. I'm glad it's selling well but I don't expect a critical reception to hit any particular high marks, because the issues are really pretty widespread and a lot of the game's appeal is structured around the online features.
Haven't even finished the story which makes this a pretty preliminary review, but it's actually kind of a complicated game, and I'm not all that surprised it's taken a while for many reviews to come out. I have a lot of questions about how things work and the best things to pursue in ways that are more like an MMO or game like Monster Hunter than what I expected. But there are basically two things I can say about it with relative certainty, 1) if you are any kind of dbz fan whatsoever, get it and 2) if you aren't a dbz fan of any kind, I can't recommend it to you. That's not to say people who aren't dbz fans can't possibly enjoy it, I just don't necessarily think it's worth their time. I mean by all means, try it out, but I can't exactly imagine it converting most people (or even making a basic amount of sense) if they have literally no experience with the manga or show.
The real value here is for people with at least a passing familiarity with the characters and the universe, and the most obvious accomplishment is merely allowing you to create a character that fits into this world and can fight alongside the heroes and villains you've seen fighting each other a million times. You get to be that character that shows up and manages to overcome the enemy when all the other characters have exhausted their power. And... that's exactly what you've always wanted and you know it. The combat is fun and extremely customizable (though also deeply unbalanced in a competitive sense), and the reward structure is ridiculously addictive, especially when you get to experience the online co-op as it's intended to work. I've seen a lot of comparisons to Destiny (and PSO as a sort of shared ancestor, which is more than fair), but the RNG base is much more similar to Monster Hunter in encouraging intensive over longitudinal play: I may not be playing this a month from now, but dammit if I won't replay the same mission 15 times in a row grinding for a certain drop, and like it. The real saving grace here is that there aren't any progression-critical items that can only be obtained by RNG, so it's just the things you want in terms of customizing your character that you're grinding for.
There's also the sort of built-in excuse that what you're doing when you repeat quests for indefinite amounts of time is simply training to become stronger like any character in DBZ would. Repeating the same thing over and over again in the vain hopes of spontaneously unlocking a powerful ability? Sounds a lot like Vegeta endlessly pursuing his SSJ status or a good session in the Hyperbaric Time Chamber. It all just feels a little more native than grind usually does, and saves the game from feeling like "Psuedo-MMO Action RPG with DBZ-colored Paint Applied." I also really need to give a shout out to the design decision that allows you to choose any character you've unlocked on the roster for Parallel Quests and still get XP and drops for your own custom character. Many of the series' stalwarts play very noticeably different from one another, and even have multiple variants that themselves feel different, and when choosing them you get access to abilities and skills you haven't necessarily unlocked yet yourself. Being able to do this while still progressing vertically keeps things fresh for me despite enormous amounts of repetition, and I've honestly never really encountered another game that provides this option.
The real headline is that if you're any sort of DBZ fan whatsoever this should just be a game you're playing right now. There's enough fan service, good core ideas and attention to detail to win just about anyone who has a favorite character over, and plenty of reasons to spend time in the world. I'd be comfortable describing it as a 6/10 for just anyone, but an 8.5/10 for big fans- though a point deserves to be docked from either number if the network stability doesn't improve.
edit: DBZ Abridged is the ultimate companion to this game, I beg of you to watch it if you haven't. Tragically it only gets up to the Cell Saga so far.