Naturally, when this specific scenario isn't the case, you wouldn't cut any uneclipsed wraths from your rotation and thus lenghten your cycle by another global cooldown.
Ofcourse, this would mean you'd have to sacrifice another glyph, preferably Glyph of Rebirth since other members in your raid can provide the battlerez.
This glyph alos makes other of your utility abilities grant eclipse energy out of eclispe, such as solar beam, vortex, stun, roots, typhoon, etc.
I personally like to roll with this glyph on heroic Horridon where I'll be using FF to knock the dino away (FF is an omnidirectional spell, therefor macroing this to always go on the pink dino, is more beneficial over dotting it, since you won't be getting any SS procs from that target and the damage is wasted.), it is a nice small bonus for specific scenarios in pve, to be fair, arguably makes little difference at all.