If it was just for the sake of being iLVL 110, then I think that being unable to equip two rings of the same type shouldn't be an issue- I don't think it makes such a big difference being iLVL 109 or 110: I'd just wait until I drop the second ring from the Second Coil of Bahamut.
However, I can see a few good reasons for asking to remove this restriction.
Coil, Ramuh and Soldiery's ring have different stats but what I wanted to buff just one in particular and 2 out of 3 rings ignored it?

EVENSTAR RING 110: INT +18 ACC +19 CRIT HIT RATE +13
HIGH ALLAGAN R. of CASTING: INT +18 ACC +19 SPELL SPEED +13

At the moment, I can't maximize my critical hit rate (example) while it would be nice being able to choose the gears that fits better with your play-style. It is what we are currenly doing with our armors from Syrucs Tower and Weathered gear or with the Upgraded soldiery armors and the Second Coils drops - right?