Miasma II and Virus are not crowd control by typical PVP definition; they are debuffs. Tbh, SCH could use a better peel in PVP or at least an instant pet resummon on a CD so they don't have to blow a Swiftcast that could be better served on a Blizzard II, but those aren't actually problems that stem from an ACN root, it's just poor PVP balance.

MP cost per potency and Aetherflow CD/rate of return ARE problems that stem from an ACN root though, and by the developers' own admission it's why SMN was left in such shoddy condition in Final Coil.