Got my copy a few days ago and ATFHSIOGHSOHGFGSGH I am pleased with Jin's gameplay. My main teams are Nina/Jin & Jun/Nina and gotta say, Tag Assualt is so fun and so easy. XD
Some characters have special winposes that haven't been revealed before so you gotta dig deeper.
However, there are some mixed points about this game in my experience.
Bad Points 1) Customization is sort of confusing- you cannot edit a) and b) but you have 10 slots which you can customize. Unlike Tekken 6, you have to buy items rather then unlocking a lot of them- but you will unlock some in ghost battle like Jun's classic T2 outfit. To color the default costume- you gotta get the hang of it, it is confusing at first.
2) You do NOT have a screen capture button on this game. Only T6 had that which gave you crystal clear screenshots of the game. Sucks for those who wanted to macro their tag teams. XD
3) Making money is a
slow process. There's no SC mode in here. You have to fight a slew of battles (Ghost Battle- pick the gold bar) to get a bit more money. But you guys probably already knew that.
Good Points 1) You get to rank above 1st dan offline in this game.

2) More customization options, I personally am happy with the variety of different items for example Nina only got latex in T6 but now she has chinese dress, jeans...etc.
3) Some characters- Kunimitsu are equipped with really cool moves (that fire breathing one) that is just sooo good.
4) Forest, Combot, Alex & P.Jack are already on the disc so you don't need to download them.
5) You might find that some of your favorite characters are better in gameplay than they were in T6. I personally found some of my characters have been buffed up with new moves.
6) You can unlock ENDINGS through ghost battle if you don't want to play Arcade made. If you pick the gold bar- you can unlock 2 endings at a time and customization option.
*****
In conclusion, this game is really good- the tekken team did put a lot of effort into it- you can tell by just looking at the different BG in the main menu. There will be more goodies to download later and there MIGHT be a few surprises on the way. I think this game makes up for what it lacks. And maybe there will be a DLC mode (bowling?) where you could make a lot more money.
Right, I'm off to play TTT2 to discover more. Hope you guys are enjoying your own copies.