Players do get double the amount of characters they got with the first season pass, and there's probably more to come outside of that, not just only characters. Tekken Ball anyone?
For the record, I have bought literally no DOA5 season passes.
The Tekken 7 pass doesn't really seem like a ripoff. But, I don't want to spend any money at the moment. Especially since I haven't been playing T7 much recently.
Real talk though, the only time I buy season passes is when I like everything that comes with it, or there's some exclusive dlc that's only available to season pass holders, so far this has neither, so no buy from me, the value is good, but I ain't buying it