I'd argue that if your still running a dispell in every card file you make just to deal with Killing Machine that Killing Machine is still dictating how card files are made and thus the tournament is still, even to a small degree, revolving around Killing Machine. The difference from normal play is that everyone has access to answers to Killing Machine and that Killing Machine itself is limited to 1 per deck so you know for sure once you deal with it the first time you won't have to deal with it again.
In my play so far I actually saw more Refess then I normally do in the normal rooms, its definitely not overly common but it was showing up about once every 4 games which is on average how every clan should be. I have yet to see a good Refess, every refess I ran into I easily walked over so far, but as natural Refess player it was definitely nice to finally be on the giving end of the Refess beating for a change (actually I don't believe I've ever actually lost to a refess deck even with my refess deck, including in both closed and open beta so technically I have been giving other refess beatings too but its not the same when I'm also using refess).
I may try them out myself just to see if with all the rarest cards at my disposal I can keep up with the other clans, but the only card that really looks that interesting to me I don't normally have access to is Dragon Rider and I had several of those during closed beta (*sheds a tear for his lost dragon riders, stupid pointless server wipe*) so I've already had some experience with Dragon Riders tricks.

