Okay, just tried it, and for the first thing I'm gonna say, It's that I'm gonna miss being able to make it the size of the planet and engulfing the screen in blue light for multiple seconds.
The next thing I'm gonna say, is that, While the size and damage have definitely been reduced, it's to a degree that it's not really annoying, although I will still miss the lack of a size limit. And quite honestly, it's not bad, but rather kind of...Weakish.
So it's more of a combination of what you two said. It was undeniable OP before the update, but it still feels kind of weak now.
So I think a solution might be to either make the attack post-moonlord, or, add the universal spirit bomb to replace the insanity that was the super spirit bomb.