Curious about Malz's numbers

I'm legit curious as to why Malz's numbers on his abilities are always changed so dramatically whenever he gets a buff (like once, maybe?) or nerf (too often). Others lose 10% scaling or some base number adjustments; not only does Nether Grasp get hit with both, but 30% ratio taken away from the Beam damage is pretty intense. I read Patch Notes every cycle and maybe I've skimmed too much on champs I don't play, but I feel like Malz is one of the only champs who sees such dramatic shifts whenever he's touched.

So, this isn't just a rant cause I play a ton of Malz, this is a serious inquiry: Is his data really that impactful and out of line compared to when others are adjusted? And maybe this doesn't seem fair to me since I AM one of the Malz players who will never "just press R," so I haven't really noticed how much the ult does by itself. I'm still kind of in the mindset of "I can't even try unless I use everything I can since my R is just crowd control" that I had to get used to after his rework (when the beam damage was taken away entirely). I've definitely noticed the damage increase but it never feels bursty to me, at least not enough to justify attempting to kill a target with just the ult (unless I'm 10/0 with a majais).

So my other question would be: Does the data show that Malz shouldn't really notice any additional trouble with his kill potential if he IS using everything at his disposal before pressing R? Would be a real shame if we nerfed more than just overkill damage.

And of course, I realize this is preseason for a game that's always in flux as it is, and the biggest answer to most of my concern is that I need to try it and see for myself how it feels. But still, I'll always wonder about the intensity of this nerf. 30%? Is he really doing that well right now? (I haven't been playing too often this preseason, to be honest.)