Downloading it will consume less than 2GB of your PS3's hard disk space, which to me is somewhat a convenience given my poor Internet connection. Anyway, let's move forward with the reasons why the game only took that little of a space on my console.
The initial roster shrunk down to eight: Kazuya, Asuka, Lili, Paul, Marshall Law, Lars, King and JACK-6. It was such a good thing for me that they included Bryan in the set of unlockable characters aside from Alisa, Leo and Steve. Heihachi, Jinpachi and Ogre serve as the unplayable bosses in the arcade mode. This alone takes a lot from the memory requirements.
Another thing missing here is the option to change the difficulty settings. I found the challenge of the arcade mode lacking. Then again, the game is supposed to be played online; the arcade mode is just for practice.
As for gameplay, the Bound System that defined Tekken 6 and Tekken Tag 2 is also absent. As an indirect replacement, the game features Special Arts and Critical Arts. They selected certain moves for each character and modified them in such a way that they look Street-Fighter-y.
If you put TekRev and TTT2 side by side, you'll notice an obvious loss of certain visual elements in the former, that being the characters don't get stained or soaked in water when they get knocked down. (Conveniently, they didn't include the stages from TTT2 with watery areas. On a positive note, I found a welcome change in this game: they remodeled Asuka's and Lili's faces. I can barely notice the changes in the others, but I'm sure they also retouched them, which to me is great.
Something that they need to work on is the player match mode. When you're in a game lobby and the host decides to leave it, the lobby dissolves. They could fix it by reassigning the host spot to another player still in the lobby for the session to continue. Connecting to a lobby is inconvenient enough; at least they could save us the trouble of staying in one. But putting that problem aside, I haven't seen any serious problems in the game's online matchmaking process.
And just recently, Tekken Project director Katsuhiro Harada announced that they'll update this game to include a training mode. If this game's features do not make it friendly enough for beginners, then I think the training mode will get it covered.
I think Tekken Revolution succeeds in introducing the whole series to first-time Tekken players. While I'm not technically a beginner (as I've got my hands on Tekken 3 onwards), I still enjoy the game for the simplicity it exudes. The mere fact that you must play to unlock the remaining four characters is nostalgic in itself. And have I already mentioned that you can download it for FREE?
Talk about fan appreciation.