For most of 2012 and 2013 I was simply unable to test SMF out myself. It was simming to be the best DPS spec for warriors as early as normal Mogu'shan Vaults. but like all warrior specs it's ludicrously gear dependent and arms was simply easier for me to gear up - you can completely hit cap arms, it's not so shackled to crit as the only worthwhile DPS stat, and most importantly I had a two handed weapons. One handers were a myth told to me in a dream by ghostly apparitions, not items I actually saw drop. Even my tanking weapon was in fact an agi weapon that would have gotten disenchanted if I hadn't picked it up.
Then I found myself in a situation with three other DPS warriors, and again getting 1h DPS weapons seemed absolutely impossible because I was constantly competing with two other players for them. But the funny thing is, eventually everyone else gets geared up, and then? Then the drops are yours to rescue from the disenchant pile. When a thunderforged Qon's Flaming Scimitar dropped and no one wanted it (saving their points for heroic drops, no doubt) I decided I'd snap that up and go SMF for a week. What did I learn?