No problems with what was moved! I also have a several proposals for stuff.
		
		
	
	
I think Zweilous should be moved to 
Mid or Top C. I feel as if Low C is too low for Zweilous, because its actually a pretty good Pokemon! Zweilous has a very good typing for RU, with Dragon being one of the best typings to have in the tier, and Dark granting it a STAB Crunch and an overall interesting set of resistances. The biggest one is that it resists or is immune to 
everything that Slowking typically carries, which means it can easily set up a Substitute right in front of it and get a free switch into it, or just go for the KO with Crunch. Hustle makes it hit rather hard, and Outrage coming off of a Zweilous is nothing short of scary, even with an Eviolite attatched. Speaking of which, said Eviolite actually gives it quite a bit of bulk - more than Druddigon actually, which allows it to take on random HP Ices from opponents more easily, and lets it take advantage of that awesome typing. Superpower is always nice too, geting a OHKO on Aggron and making it not helpless against other Steels. While it definitely has its share of flaws, such as a somewhat dissapointing speed, competition, and a weakness to some common moves like Megahorn and Close Combat, I feel like Zweilous certainly has enough merit to not be stuck in something like Low C.
I think Sigilyph should be moved into 
Top A. This thing is easily one of the best Pokemon in the tier, capable of performing so many types of sets. The Life Orb set, the CM + 3 Attacks set, and the CM + Flame Orb set are all devastating in their own right, and access to Magic Guard makes it very hard to wear down despite the fact that it is somewhat frail. With access to Psyshock as a STAB, most special walls can actually struggle a bit against it as well, setting it a bit apart, and even with Psychic its great coverage ensures that it . With the ability to easily provide offensive pressure toward the foe without needing to worry as much about being outpredicted and worn down, set up and sweep or power through the foe, destroy stall with its immunity to passive damage, cripple physical attackers while still posing an offensive threat, or just plain being a fast and strong Pokemon, I believe Sigilyph deserves to be amongst the near-best in Top A.
I think Moltres should be moved into 
Mid A. No argument that Moltres is a big threat in RU, but there are two really big problems with Moltres. Stealth Rock is a big offender... while it always has been, it is very easy to get Stealth Rock onto the field, especially nowadays when Steelix, Rhydon, Druddigon, Uxie, and others boast the ability to consistently get Stealth Rock on the field even if it gets spun away, and providing constant offensive pressure doesn't exactly work in this case. The only "really good" spinner at the moment is Kabutops, and while it is a good pairing with Moltres, pulling off that spin can occasionally be a bit difficult when a lot of Pokemon can put Kabutops under pressure, while Moltres and it share a common Electric weakness. Even then, Moltres's power comes at a Hustle-esque cost, with both of its STAB moves being fairly inaccurate. I tend to find Moltres a bit unreliable at times as a result, because Stealth Rock really puts a damper on also what is otherwise a rather good bulk. No doubt Moltres is a powerful force in the tier, but I think it is a Pokemon that you to support with something rather specific, something a lot of Top A Pokemon don't require, and usually when I want to just put a Fire-type on my team, I'm usually going with Emboar or Entei, since they fit onto spinless teams better usually. Not opposed to it staying in top a though tbh but i think mid a is more fitting...
		
	 
Finally, I think Rapidash should be moved into
 Low C or maybe even Top D. Rapidash might be the most suicidal Pokemon I've ever used in my life, and it just not very good in most cases. Rapidash, at most, is going to last 3 turns if you repeatedly use its STAB because it takes away so much of its HP - sometimes its ridiculous actually, with many OHKOs that would otherwise be cool taking away up to 50% (!) of Rapidash's HP, and then you have other factors such as a Stealth Rock weakness, Life Orb recoil (the item is pretty much needed to make it a threat, otherwise it is lacking in power). As a result of this, Rapidash is not something that can be relied upon throughout the match in order to be your prime Fire-type - while Megahorn does get the big hit on Slowking, Emboar's Wild Charge is no pushover for Slowking, as it does quite a bit of damage to it, and Megahorn will not actually kill a Slowking unless you have hazard support. Its speed tier isn't very significant either, considering 105 isn't fast enough to get stuff like Galvantula regardless. it is weaker than Emboar, who can Scarf itself and use its Fighting-typing and Stealth Rock neutrality and Entei has Extremespeed, while both have a much greater HP stat and bulk to make them more durable - it really becomes noticable Rapidash can't take a hit sometimes. Overall, I really don't think Rapidash is very good outside of having Megahorn, and its rank should reflect that its a bit niche.