As an AST main since 3.0, I'm happy that the devs finally buffed us this much. We can take the WHM spot in raids just fine. We can't replace a scholar for obvious reasons, but that's not what this post is about. Simple potency buffs across the board are fine. And yet I can't shake the feeling that AST should have been this strong right out the gate.
I wrote this in a post last year--the job's main problem isn't that it was underpowered since Heavensward's release. It's that the astrologian has no real identity of its own. It's a hybrid job in a game that requires maximum efficiency in order to deal with enrage timers and timed tank busters. With the sect system, astrologian tries to be too many things at once. It's a time mage, an RNG support job, a shield healer, a HoT healer. It's not particularly good at one of these things, especially when you can pick a white mage or scholar for reliable heals/shields, or a bard/machinist for reliable support.
Though they do provide support on-demand, bard and machinist suffer from this same problem. Forcing a support role onto our only physical ranged DPS splits their identities. I think a lot of people who played FFXI miss their rangers (pure physical DPS with crossbows and guns). While corsair (support/gun DPS like machinist) was fun, in a lot of ways, they paled in comparison to the pure support bard gave. On top of that, Wanderer's Minuet + Gauss Barrel further turns the jobs into casters. I know there are people who enjoy these things together, but from a design standpoint, it's a strange combination.
Often times, when jobs don't have a single identity, they fall flat. When they try to do more than one thing, they end up not being very good at anything. Unless they're overpowered. Scholar and warrior are two examples of jobs that can perform their main role on top of DPSing well. But we all know why that is, so I don't need to get into it.
The devs were too afraid of breaking the WHM/SCH combo that they ended up wasting astrologian's potential as a time mage support/healer. That felt indecisive. In the future, please commit to jobs having one, solid, strong and unique identity so that this doesn't happen again.
It would be nice if we could have a dedicated support role down the line.
tl;dr: in astrologian's case, the job needed to be its own thing from the start. It's too easy to go with a white mage and a scholar and call it a day. It's too late for people like me who decided to sit out this raid cycle because of how poorly the devs handled things. Hopefully in the future, we can have jobs that do one thing well. Not ones that try to do too many things at once and pale in comparison to other, more focused jobs.