With the way combat logs work it is nearly impossible for us to figure this out on our own.
If I go full allagan on my monk my accuracy would fall very low. Why? Are we confused and we don't actually need very much accuracy for coil? Did you design some coil gear sets to not even work in the instance where you got them?
Is there a reason why primals appear to require almost no accuracy? Do you want us to waste large amounts of stats on our gear on accuracy that is nearly useless outside of coil?
Why is it that smn/blm appear to need less accuracy than the other dps and tanks? Does accuracy work for physical damage similar to the way it has in other games where special attacks and auto attacks use different accuracy numbers?
Is it really possible to reach 100% hit rate or is there some percent chance we can never go over?
What effect does difference in monster level vs player level have on accuracy? How does this fit in with bosses in CT/HM/EX/Coil?
Is there a reason Bards where given a debuff to reduce evasion which appears to be nearly useless?
In all my time playing MMOs I have never run into someone who didn't want to improve their gear... even if it was just a tiny increase. Currently the unknown that is accuracy is restricting the min/max game that so many of us actually like doing. Please for the love of whatever primal you worship tell us how this works.