I think it's mostly a pacing issue. Gearing in all tier if you wanted all jobs takes the entire time. Next week I'll finally finish the Caster set. Just a couple of weeks to spare.
The unlock always feels very late, and only in tier 3 we get the tome doubling. There's other issues...
Like how in tier 3, you get the Relic weapon then a month later you get the echo. If you got the Relic Weapon, then you already have this massive boost. The Echo comes too soon! That thing should be last minute!
Yet more things... The Alliance has "Catch-up gear", but it has stinky stats and one per week, at the same item level as Augmented Crafted?...
There's a lot of issues that add up, to where it doesn't seem to make sense in the modern day. Maybe it made sense when I wasn't playing (heavensward), but as it is the system doesn't really let people catch up, or easily experiment after they beat the tier. And when it does it pulls all the triggers so close together, they don't give you time for it to matter. At the start of the tier 450 tomes and everything is fine, and makes sense.
