Note that this is my opinion, not reflective of the entire VR team's. However, I assume those who didn't vote Noivern to rise also had a similar mindset. The big standout to me on why Noivern didn't rise is the competition it faces from top tiers like Salamence and Hydreigon. Choice Scarf Hydreigon is much stronger, being able to immediately OHKO Pokemon like Cobalion and Azelf which Noivern fails to do so, and much faster, being able to outspeed Pokemon Noivern fails to such as Choice Scarf Diggersby, +1 Gyarados, and +2 Celesteela. Noivern has benefits over Hydreigon by fitting Roost easier and being able to switch moves, but Hydreigon is generally better as a revenge killer due to it's greater damage output and Speed. Furthermore, even though they do different roles, Salamence gives Noivern competition as a Dragon + Flying type with much greater defensive utility. If I use Noivern, I can't really use Salamence without stacking weaknesses, and Salamence being a great Pokemon means most players would prefer to use Salamence + a different Speed control like Diggersby in general. Moreover, the popularity of Primarina and Nihilego is annoying for it, and even though it can get past the latter if its the main switch-in to Noivern it can still be an uphill battle. Noivern hasn't gotten too much major usage recently, it got decent Swiss usage but nothing too outstanding and it had only one use in SCL. B+ is a fine ranking for it not bad at all and certainly has a fair bit of potency in the tiersry gurl dead af joke (i'll take it if u actually explain all the c ranked mons INCLUIDING this tho
and "i have no idea why this is ranked" aint valid smh).
anyw why didn't vern rise? seems like meta trends kinda benefit it to some extent n it's solid speed control.