SE dedicates more resources to the overall design of the game (RE: Job design schemata) when they can afford to upend things (Re: Expansion "resets"). This is why complete job overhauls happen at expansions, only a few Job mechanic overhauls happen during major patches between Tier drops, and "band aid patches" largely consist of potency and recast adjustments.
In other words: SE largely responds to significant community disappointment and response, but do so in a way that doesn't completely turn everything on its head every 3 months. 2-3 jobs every 6 months or so might see a significant revamp, but the complete reworks (Like Dark Knight, Machinist) happen at expansion when they can afford to review future content and design the job to fit into that scheme.
She keeps bringing up this argument because the argument presented by this thread is that -TANK NUMBERS ARE LOW AND SO TANKS ARE WEAK-. Except that's opinion - Tanks, from a pure point for point numerical all things included standpoint are just as strong, if not stronger, than their prior iterations, but much like Tenacity, it doesn't show on the bar graph so nobody cares.