To clarify, i was the one that brought up that standard Baton Pass team members should be pumped up a few ranks because of how potent full Baton Pass teams are as a whole. Then, people argued that all those Pokemon don't deserve high ranks because they have use only on Baton Pass teams, and only with very specific team members, which makes them incredibly niche Pokemon, except from Scolipede of course, and this is the reason that it is ranked the highest out of any other Baton Pass team member.
However, just because the standard Baton Pass team uses exactly the same 5 Pokemon doesn't mean that there is no room for variation, it just means that this is the most effective combination. If Pokemon such as Smeargle, Mr.Mime, or Sylveon were not available, i am sure that Baton Pass teams would still be a force to be reckoned with, just not as much as with the best combination available. And consider for a moment that Baton Pass teams at their strongest form are most probably broken, which is why most people want to nerf them. This means that even if you don't use the best available combination of Pokemon on a Baton Pass team, as long as you use Speed Boost Scolipede + Magic Bounce Espeon the Baton Pass team can still be incredibly effective, just not broken to the extend that Baton Pass teams are now. What does this mean? That each Baton Pass member doesn't need an entire team of 5 specific Pokemon to support it, the only musts are Espeon and Scolipede. This is not that different from Deoxys-D for example, which needs one Defiant user to punish the use of Defog, often Air Balloon Aegislash, and fast Pokemon that are able to pressure the Defog users, which doesn't leave a lot of room for options, and makes Deo-D offense really limited to what it can run, not that far away from Baton Pass teams.
And even if we accept that the less important members of Baton Pass teams need a whole team to support them and thus not deserving more than C rank due to being very niche options, this is not the case with Espeon and Scolipede. Espeon and Scolipede are the support on their own, and don't need anything else to rock your world. You can make a pretty damn good team with just Scolipede, Espeon, and four offensive Pokemon, because that's how good of combo those two are. Easy Defense + Speed boosts + no Taunt / phazing can make every offensive Pokemon a completely machine of destruction that is incredibly hard to stop.
For this reason, both Scolipede and Espeon should be at least A-, if not higher, because even outside of full Baton Pass teams they can make any sweeper capable of sweeping entire teams in a moment's notice, and instead of stuff such as SmashPass with duals screens or other gimmick strategies, the Scolipede + Espeon boosting combo is not hard at all to pull off. Both Espeon's and Scolipede's support is incredibly potent, and when combined together, this support easily reaches the level of Deo-D's and maybe even higher. However, you need two slots and not one to do this, which is why A or A- is more appropriate for those two, but not any lower.
This is not about full Baton Pass anymore, it's about the incredible potency of Scolipede + Espeon on all kinds of different teams, so let's please stop discriminating against those Pokemon just because they are the mvps of one of the most hated playstyles.
EDIT: Forgot to say that Scolipede should be one rank above Espeon due to its ability to function much more independently, as even without Espeon it can successfully use a cleaner set and a SD + Baton Pass + hazards set. So Scolipede for A and Espeon for A-.