MavsObbession, you obviously know your VGC meta - you have provided some very thoughtful rate for that Goodstuffs team, supplementing some calcs to back your Grass Knot suggestion. The amount of detail is sufficient and spot-on, as well.
The second rate could use some improvement, though. You noted the big weakness to Rain, but then in your example you cited Ludicolo, which is hardly seen in OU ladder due to Aldaron's Proposal (it's not the same as VGC :d). When you explained Golurk's mediocrity, you mentioned Grass Knot, but that is also not a common move in OU, since most opt for Giga Drain for recovery and to hurt Rotom-W / Politoed. When you were comparing Scizor to Escavalier, I would have pointed out Scizor's access to Superpower, U-turn, and technician Bullet Punch before Bug Bite and its ability to knock out Ludicolo. You are obviously in VGC mode here -_-;;
Although I may also be guilty for doing this - try to avoid making generalizations. When you recommended Ferrothorn, you followed saying that "it's a best staller in OU," which is not relevant to this particular team (unless this team is a sand stall team). You should cut to the chase and explain how Ferrothorn offers reliable protection against Rain offense. When explaining Ferrothorn's set, you emphasized his stalling capabilities more than his ability to tank Rain Offense, thanks to its amazing special defense and resistance to Water + Electric offense (although such explanation is less necessary when rating more experienced players). You could have mentioned Leech Seed + Protect in context of dealing with Rain threats (ie. with "Leech Seed + Protect," it can tank powerful Rain hits for the team longer).
Your recommendation for Hippowdon is sort of vague, too. I don't know if I would be convinced in using Hippowdon just because it offer physical bulk and an additional sandstreamer. There's no urgency to make this change, because you have neglected to identify the physical threats that plagues this team and did not relate it back to your Hippowdon's suggestion. He may also not see the need for 2 sandstorm mons. I personally don't see the need for a second sandstreamer, since this team does not really utilize mons dependent on the weather, such as SubAcrobatics Gliscor or Sand Force Landorus. Hippowdon also isn't the best answer to SD Scizor, which can plow through this team. Jellicent or Skarmory may have been a better suggestions.
I think a little bit more meta knowledge is necessary for rating OU teams. This way you can better pinpoint threats and offer a more practical solution. Admittedly, the team you chose to rate was horrible, so props for trying to rate such a demanding team!