It is true that her Barrier is bigger than Grace’s heal but it doesn’t really justify not having her cooldown lowered. I remember the patch notes said clearly that they had to make the cooldown longer because of echo and now that Echo is removed it isn’t a problem anymore.
And Lorelai unlike Grace doesn’t have anyway to reduce her cooldown except buying cooldown items which she only does if she is in Top Lane. Grace can just reduce cooldown by basic attacking.
And remember that Grace’s heal still provides a Holy Shield ontop of this while Lorelai only cleanses negative effects.
Oh an btw, If I am not mistaken you lowered her CP ratio in her ult to 150% because you said that it made CP lorelai too good and then you added bonus health ratio to compensate so it is probably not 200% anymore???