You seem to have some comprehension issues here. I'm not sure why you're getting so bent out of shape, but no, I absolutely don't consider a couple hours of story mode to be meaningful single player content. I criticized SF5, didn't I? Most competitors go for something much longer, and/or include lots of other modes like Arc's dungeon modes, Netherrealm's towers, KI's board game-inspired RPG mode (definitely the apex of the genre), etc. It'd be nice to have some extra stuff to mess around with, and it doesn't sound like we're getting much of that from Tekken 7. (I'm personally hoping for some hidden Starblade.)
I love AI battles too -- again, notice I said I was looking forward to the new one in Tekken 7? -- but sadly Tekken is historically among the worst out of all of them. The AI just doesn't play anything like a human, it's extremely predictable and easy to cheese. It seems to follow the standard bad fighting game AI routine of randomly failing to block instead of having actual, player-based weaknesses. Virtua Fighter and particularly Killer Instinct just stomp the hell out of it. It's still fun to play in TTT2, I definitely spend more time in Ghost than I do arcade mode (was just playing it a couple nights ago), but I'm hoping Namco seriously stepped up their AI capabilities in 7. I plan to put a lot of time into that mode regardless, but good AI would give it serious staying power.
(Combot was great if you wanted to not play actual TTT2 with actual characters, but once I 'beat it' I happily never bothered touching it again. Character customization options were also pretty damn bad in TTT2. I found it impossible to make any character not look like a dork. I know that's Tekken's trademark style, but still.)