adding a new rune to inspiration 3 is one thing, but if celestial body wasnt strong enough to compete, you could have buffed it slightly instead of removing it entirely. if you can add a 4th rune to resolve 2, you can just add a 4th rune in that slot to inspiration aswell.
reduce the damage penalty by 2% or make it fall off a couple of minutes earlier. its a niche rune, but you already cut resolves health bonus in half without anything we can do about it. why remove another source of health?
its a decent rune to take against extreme lane bullies to not get zoned from cs from lvl 1 on.