We have two ring slots, but there's currently only one we can buy from the gear vendor with tomes and we have one ring that comes from the end game 8 man raid. I've done raids in the past, but haven't been able to due to health reasons...so my ilvl is relying on tomes right now.
Having to buy a 2nd version of the same tome ring which can't be upgraded until right before or during the next expansion is terrible design as you can't have two of the same ilvl tome ring since they're "Unique" items. So you end up with a 660 ring and a 650 ring instead of two 660 rings (which is actually the healer BiS rings and super silly that we have to stay 10 ilvl below thanks to stats).
You did remove this "Unique" label from older rings gear like the 4.X 400 and 5.X 530 ilvl tome rings. Just remove it from the current max ilvl gear tome rings as well. It makes no sense not to at this point...except that as policy you don't remove it from any of the current expansion rings (radiant, lunar envoy, or credendum gear sets).
If that policy won't change, then there really needs to be another ring option as right now you can't reach the max item level without doing a savage raid in the current expansion (and again that savage ring may not even be a BiS option for some jobs).
Please make an extra ring with different stats (it can even look the same)...then you don't have to go back later and remove the "Unique" label from the rings. Win win. Just give us an additional option to purchase a new 2nd ring with different stats from the tome vendor or like I said...remove the "Unique" label from the current one.
If you're feeling generous, then I know people wouldn't mind having an additional ring stat variant drop from the savage raids. You could also introduce a new trial like you did back in 2.x, when Ramuh's rings were another gear option for the ilvl 90 set aside from tome or raid rings.
Or just remove the extra ring slot. You did it with belts. As a bonus...you could fix the odd layout around our character gear slot screens since the accessory side has more slots that the left side slots.
There's just really no reason to lock players out from reaching max ilvl in current content with tome gear. Tomes get spent either way and the tome cap is still 450. The 24 man raids and hunts are helping users upgrade items for them anyway each week.
I know the wep upgrade with hunts/24 man coins and final relic steps haven't come out to reach max ilvl yet (and maybe you will remove the "Unique" label from rings around when those come out), but why...why wait to give us that option to get 10 ilvls on our 2nd tome ring when we can upgrade the whole set with coins/hunts at this point?