I wouldn't say BLM is the only punishing job left as dragoon can be punishing along with Bard. The big problem they need to fix is dependency on spell / skill speed materia to align burst windows in rotation. BLM is punishing because the casts are so long without any coverage for drop off due to movement, and even if they fixed that aspect it still would be the most punishing job since because those casts are so long, having to cancel out hits a lot harder to personal dps than other jobs. They are doing that incrementally but there are jobs like DRK that they probably are going to revise at a later point.
Complexity doesn't always net more dps, but it often does since a more complex job is also more complex for the devs to balance, since there's so many variables involved in the output. They could be making a lot of changes to make the jobs easier to balance on the development end.
