Hmm, ya maybe.. But at the same time no. Amber seems to only really be prominate in thier area soo, i don't think she is worling with amber.Seems we might finally get to see Sera get her abilities back soon and I get the feeling her sister might unknowingly working for ember.
Im glad to see that Arlo has finally opened his eyes!!!! Though not being the best ruler he is better then John. But I know for a faxt John wont listen its too late now...Arlo kind of manipulates its fault for pushing him but hes abused his power and position before ruining peoples lives for his entertainment. And allowing low tiers to be abused under his watch allowing any high tier think they can do what they want only getting pissed when they go against him. Sera is the ruler the school needs since cares for everyone's well being.
As for the weakness they are giving Johns ability of not being able to copy non physical abilities doesn't make sense since John was also able to copy the visual component of the hunted ability. And even with the weakness with John only copying physical abilities he can see how does that help Remi unless she gets hell maybe like an invisible user.