His reliance on a specific tool makes him easy to read and most of his attacks are easily SS'd.
What? Easy to sidestep?! Maybe if the person is stupid enough not to throw in the entire string. Even if you sidestep one of Jann's attacks, the next one will almost always hit you, so essentially the SS is useless. And I agree with DR2K, wtf is linearity? That his moves are SS'able yet you can almost never interrupt his next string? That he is basic? That he looks like a freaking 90 degree line? How is that even a freaking weakness?
Specific tools to rely on?
1)Everyone has specific tools they rely on.
2)What specific tools? Essentially almost every move he has is already a great tool to win the game, be it 66T, dragon stance, etc. The only difference is that no other character in the game has better tools than he does.
3) His damage output is ridiculous just for playing the same game everyone else in DOA5 plays.
And to top it off, it's absolutely ridiculous that his mid punch hold guarentee's dragon gunner. I'm sorry but I don't see any of these so called "weaknesses"