How hard were Vashj and Kael'thas originally?
I never did them at level, were DPS levels lower due to different talents?
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Or because people just didn't have access to the resources we do now?
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Or the server worked differently (for example, the rifle off big bad wolf was BiS until Sunwell due to the server architecture at the time and something about clipping auto shots?)
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Or because they were new mechanics at the time, and now half the raid knows them already?
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Or because we were bad?
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Because there were a lot of 5/6 3/4 4/5 6/9 guilds back in 2007.