I just wonder what is wrong with the normal story mode from tekkens in the past.

" yup im hating it! Well i think it could be ok if it was just an extra thing. But i like to play tekken and see all the endings but you cant unless you play this scenario mode to unlock the characters :( I really really cannot be arsed with the scenario mode and therefore have only got about 3 or 4 character endings and im now very bored and annoyed by the game and probably wont play it much ever again. Its bad enough that that big daft boss thing is a pain in the bum but that is normal for fighting games these days but having to unlock characters in that crap mode to then play in the arena to then fight that big daft thing over and over and over untill you get lucky is really really putting me off tekken. "

I'm not really diggin scenario campaign, but I didn't hate it until the battle with Alisa.  I just want to disengage my fucking lock-on so I can run around and pick up bloody chickens!

The scenario mode gameplay is awful, but I actually quite like all the cool features constructed around it – like the world map, the item collection, the levelling up, the points, etc. It's a real shame that three-quarters of the achievements are based off that mode, though, and almost all of them are grind achievements.  So, they're easy but boring to get. They've also put the story cinematics for the characters in there with the Arena. I mean, you don't need ever play the campaign mode, but when that's touted as the game's main single player mode then it's a problem if it sucks.

it's not bad but i hate the controls. SO MUCH 

The actual campaign itself isn't too bad, it's just the controls drag the experience down a tonne.  
Oh, and Alisa was too hard.

Campaign modes in fighting games suck in general

I don't. It's my favorite beat 'em up mode in a Tekken game yet.

I kinda loved it, it's weird but the whole loot gathering + beat um up thing got me.