SQEX has generally stuck to that though. This isn't a new pattern.
They release something incomplete and add to it as time goes on.
This is fairly common in the live services industry and I'm not certain I'd actually want SQEX to change this because it's actually a pretty smart business move.
Not only does it extend the life of content, but it accommodates regular updates.
I mean, can you imagine how much of a drag on time and resources things would be if they waited until NG+ (for example) was 100% ready?
If they tried to release things as "complete" they'd also have to hold onto content they're brewing long enough that not only would it back up other things in the pipeline, but while waiting for things to be DONE done the players would suffer from a lack of updates and new content.
If, before adding a new job, they had to make old weapons for all old content we'd probably only be getting one job per expac, or they'd make a handful of models and just reuse them en masse to try and meet the weapon quote before making new assets detracts too much from the expac they're trying to make.
Like, if the Ishguardian restoration was released all at once people would just shotgun through it and then it would be gone. As is, SQEX can try and build interest and hype each time they release the next chunk of that content. Things like this and the relic quests are SUPPOSED to be released in stages to give people shit to do throughout the expac to keep them subbed. And better they release it in stages than make it so grindy that it takes all of the downtime to do.

Yeah, it's too bad and quite sad that Viera and Hrothgar are so limited, but we just gotta keep telling them where we want the incomplete things to go next.