It's a simple explanation:
over the course of the last few years, more and more cards released had abilities, and depended heavily on them. Older cards, either didnt have an ability or could still function (in the metagame at that time) without the ability. Currently 90% of the cards become useless against SOA, hence SOA-clans with possibly their own power or attack manipulations, eat everything. A high dmg GHEIST
card can only be reduced by pussycat bonus, or Nightmare
DR's (which arent that commonly used)
Also SOA clans dominating ELO
will increase a tendency for people to play monoclan instead of halfdecks, you want every card to have at least a bonus if it cant have it's ability, which limits the creativity in deck building. another reason why staff/people do not like SOA clans, hope this explains the huge banhammer for you, and I hope this will make you realise it's better off selling your soa clan cards for a different clan, as they wont be back for a while yet.