Sure we could, isn't that the goal? Imo if a job isn't good for the highest level of available content, it isn't well balanced.
Anyways theres not much to say from the tweet since all it said was they changed jobs to clear it faster specifically, and it's doable by non-optimal comps, and caster players(specifically smn) don't have to switch to brd to clear. All of that info is already known, but just because a job is viable doesn't make it balanced. It should be fun, and while being fun includes having an smooth rotation it also includes challenge, desirability, and being able to fulfill its intended purpose/having a purpose. I like the blms rotation, and I love that blms challenge is in fighting and executing the fight rather than fighting against my rotation. But, atm blm has no desirability and no purpose to it. It brings nothing unique to the party that isn't filled by another class doing it better.