I do remember him saying this in a liveletter that they would be focusing on job identity alot more. It might have been 6.5 liveletter are one of the dawntail specific ones.
Not job balance, but the identity. But it was a translation so it could have been taken out of context as well.

I do think they will be focusing more on making job identity matter in some way and maybe with a level cap of 100 they can do that with job mastery of some kind.