This new update is a blatant attack on the healers and unpopular clans and encourages individualism. Everyone knows how the nuker ended with its updates, now almost nobody uses it. what will happen to the most unpopular clans among the players like sacred flower? I think it would be acceptable if the infernal and imperial sides could not buff each other because they are enemies, but not between allies? http://forums.playredfox.com/index.php?threads/server-maintenance-12-12-17-patch-121.39767/
I could be wrong, but I think they are referring to the buffs you get from your band. Not your actual skills.
[CM] Ninearts has updated the Patch Note regarding this matter. So after maintenance, Healers will no longer be able to heal/buff the opposing clan. This change has been made in our KR service as well.