5 yalms might be a bit too small when fighting some of the really big monsters and you want to hit people in front and behind the monster.

The only issue though is SE seems pretty dead set on releasing a buff that only affects our melee, but I don't think this would be terrible if it only affected melee range. If you are meleeing you need time to swing. If you are in the back then you don't really the extra time anyway. Most back line Red Mages I see practically stand around doing nothing half the time.