You can do all the marketing in the world for a videogame, but if the core game isn't something the public wants, then it won't lead anywhere.
There is no marketing because there really isn't anything to market other than new characters like Kazumi, Katarina, Claudio, Shaheen, etc. They need to fix and add to the game to show the world and saying "Hey you might have skipped out on Tekken these past few years, but look at ****, *****, and **** mechanics that we added to bring you back in." Right now all they can market is "We took out tag mode, wakeup options, and step guarding... Please buy our game". Not gonna work. Let's just see what ever T7:BR brings to the table and hope it's something they can market.
Agreed. This is where I find character design to be quite important. Back when I played Tekken 3 and 4, I was brought in largely because of the characters.
Claudio, Katarina, Shaheen, Josie, Gigas and LC, although great concepts, could use more work. I'd honestly redo their default costumes, but then again no one seems to care about those anymore lol. Kazumi is pretty hype though.