I'm very confused by what SE is trying to accomplish with this game. They do a lot of things seemingly to make the game really casual friendly, but then make raiding as if it's only meant for the ultra hardcore.
Problem #1) 8 man raids + lockout = Really painful to try to always hang out with the same 7 people and find raid times that make sense for everyone. Some people clearly have more free time than others, and I don't begrudge them that, but many/most are limited by time zone/work schedule.
This issue may be at least somewhat alleviated by the "assist" system being added in 2.45, but I have to question why this wasn't implemented sooner.
Problem #2) Gotta get it done every day/week. The game in general suffers from the sense that you MUST do certain things. Like, you have to clear Final Coil, in order, every week, or miss out on potentially getting things. Already have everything from Turn 10? Who cares. Do it anyway.
Other parts of the game are even worse about this. Like having to do beastman dailies for sealant, or showing up every day for mystery map expert roullette time. If everything that was a "daily" stacked up like levequests (up to a limit, like levequests), it would do a lot for the sanity of some people. If you too strongly incentivize logging on EVERY SINGLE DAY, it's high risk - you might just burn these people out to the extent they just quit.
Problem #3) Random loot drops are too random or not random enough. As I've previously lamented, it took me over 30 wins on Second Coil Turn 1 to get the caster drops. That's over 7 months of farming, with the lockout still up. Should it really take 7 months to get stuff that by that point you don't even need anymore? Seems legit.
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I don't see a lot of risk inherent with removing lockouts, either. The super awesome folks who clear the entirety of Coil in the first week/month are still going to get everything really quickly, lockout or not. Not having a lockout would let everyone play at their own pace, rather than feeling like it's a constant rat race, plus they could gear up more from earliers Turns to have more gear for later Turns, which is what one might reasonably expect from tiered content to begin with.
Also, I think the dev team infinitely likes to "forget" that people can play any job. If they gear up one job completely, they are likely to work on the next one they also like, so they will keep doing the content even without a lockout. What's the point in the dev team trying to force people to specialize only in one job? Isn't the beauty of the armoury system that you could experience it all? Why not let people play multiple jobs at a high level while the content is still relevant? Instead because of weekly lockouts on Coil and Poetics, you're pretty much just one job for the highest raid tier, period. The lockout is really only holding back the 1% from finishing everything in a week. It's just annoying to everyone else.
If anything, I feel raid lockouts are a sign that the dev team feels you have nothing interesting to do if you don't have Coil to progress in, which... maybe add some more interesting content?