Right, Grandmaster of Flowers is currently only good for monks and with your grandiose nerf then it is not even good anymore for monks, congratulations!

EIN was good and working and there was no nerf need at all, I played often a monk and there is no any noticeable performance issue with that ability for me and your explanation sounds to me just only as a kind of cheap excuse.
Do you even know that most monks run LD nowadays because even with the current EIN GMoF is not too powerful at all?
EIN should work on at least 6 targets and have a cool-down of 1 minute then it would be still a nerf but acceptable.
And if you bring EIN that close to a normal death spell also the DC should be addressed and not only wisdom based!

Personally, I was in hope that you are finally also addressing Drifting Lotus so the DC is also counting in a trip or stun bonuses and that you are finally better the cool-down to duration ratio, I would expect at least a 6-second trip with the 15-second cool-down.