Gothitelle is something we will keep an eye on, but we don't want to overhype things and shoot it into higher ranks so quickly. Smogon Snake Draft's games will very likely give us a clear indication if Gothitelle does need to move up next update.
As for the average scores of Arceus-Ground and Mega Gengar being so similar, this image may shed some light onto the decision behind its final rank:
Gengar and Arceus-Ground do have similar average scores, but 4 VR council members placing it at S rank is why the two were seperated this way. Most of the council had the two mons at either 3rd or 4th anyway, so it was bound to come close. There was a discussion around making "S-" again to fit the two, but we decided against it because it messes with the balance of mons across the top ranks for no real gain - differing opinions on the top mons is to be expected with a thread like this anyway, and that's okay!
As for the average scores of Arceus-Ground and Mega Gengar being so similar, this image may shed some light onto the decision behind its final rank:
Gengar and Arceus-Ground do have similar average scores, but 4 VR council members placing it at S rank is why the two were seperated this way. Most of the council had the two mons at either 3rd or 4th anyway, so it was bound to come close. There was a discussion around making "S-" again to fit the two, but we decided against it because it messes with the balance of mons across the top ranks for no real gain - differing opinions on the top mons is to be expected with a thread like this anyway, and that's okay!