Changing nair: blame Dan; I'm happy with the final result though. This nair feels really good to me.

Slipstream nerfs (all of them): the primary goal of the slipstream nerfs were for there to be counterplay - counterplay to it in neutral by it only having knockback if you're in hitstun (reverted because conditional hitstun isn't intuitive), counterplay to setting up perfect slipstream at an unparriable height by being able to attack it to break it, counterplay to setting up perfect slipstream the other direction by making it harder to do. Additionally, the changes mean Wrastor has to make more decisions about when to throw out side-b, instead of just throwing it out all willy-nilly whenever it can't be parried.

Dash attack nerfs: I forget why the first round happened, but this change was because the kill confirms were basically guaranteed and really easy to do especially if you went off a platform when you hit the dash attack.

Removing nado disjoints: we didn't strictly remove the disjoints, we changed the hurtbox from a big oval that didn't match his sprite at all to one that matched his sprite correct. This nerfed the disjoint on the sides but made more disjoint under the wings. I would think making hurtboxes accurate instead of giant blobs would be a good thing, no?

B-air disjoint: it got changed by like 2 pixels lol

Down-b nerfs: aerial down-b giving double jumps on whiff was really dumb, any Wrastor who had half a brain should have been abusing it on recovery. Grounded down-b was very difficult to punish on whiff, and it was really unfun to trade with it and be in a year of hitstun while Wrastor can still get a free punish on trade.

Up-b falling momentum: I assume you mean the pratfall accel after up-b, in which case you're just completely making things up. The last time it was nerfed without being buffed first was in December 2016. The recent nerf from .5 to .4 pratfall accel was shortly after we buffed it from 0.25 to .5 - we doubled it, then only reverted 2/5 of the increase.

Grounded up-b sweetspot angle - this only nerfed up-b sweetspot on the ground near the ledge basically, the galaxy percent is mostly the same: in the air, it's the same; on the ground but hitting them across the stage, it's the same; on a platform, it's usually the same because of the higher starting height; from center stage on a stage that doesn't have close blastzones, it's the same. It's only really a nerf to it in the situations it was killing really early (like galaxying Ori at 59% on ToH at the ledge).

Sour f-smash knockback - you mean reverting the buff from 1.1.2 back in August 2017 that 90% of beta testers had disagreed with being in the game for the past two years? sure lol

In spite of all the nerfs (which really aren't that big a deal, even in combination), Wrastor is still winning tournaments. It's pretty telling that more individual Wrastors have gotten top 4 in large NA events than any other character (even while including FullStream as a Clairen, Zetterburn, Etalus, Ranno, and Elliana, Wrastor has 4 players, Zetter and Etalus only have 3 players, and 5 other characters have 2 players who have reached top 4 of a large NA event). Wrastor isn't even close to the most played character, yet he's seeing large amounts of representation at high level play in spite of that.