6 sets x 5 pieces of gear* = 30 pieces of gear / 14** weeks = 2.14 pieces of gear per week to make the content last until 2.2.

However to last between now and 2.2 one would have to want all 6 sets of gear, which most don't. The way it's set up you get 1 piece every week, and you will be able to get ~3 full sets between now and 2.2. This is perfectly paced for most people. Especially when you look at the dual purpose sets of Tanks, Heals, and Magic DPS, you can cover 6/9 jobs (at max efficiency) in full i80 before 2.2.

* = Accessories at i80 will be pointless, 1 i90 accessory a week from XM Primals, 1 i90 accessory a week from Myth tomes, so 5 pieces of gear per set that matter.

** = Roughly amount of planned time between 2.1 and 2.2

TL;DR: The pace is probably constructed precisely to last 3 months until 2.2 for a majority of people. If it's not fast enough for you, you are likely in the minority.