In World of Warcraft, each character has a unique set of skills and abilities that define their role. For example, magicians –are powerful spellcasters, who use supernatural forces to attack the enemy from a distance, but in the melee – are extremely vulnerable. These features determine magicians’ strategy: to keep their distance, do the most damage and hope to kill monsters before they get to them.
I think this may have been a case of that specific sword simply having wildly inflated secondaries. If I recall correctly, when I played during Wrath, +STR and +Hit were the stat kings for plate DPS classes (I remember all the guides recommending +STR gems in every slot and +STR enchants on everything) and secondary stats were, well, secondary, and inflated secondaries on a weapon weren't that big a deal. But now that secondary stats have so much more importance, I suspect that an "outlier" weapon like that just wreaks havoc with modern calculations, so that all the addon sees is that this particular sword offers +15 more Haste and Crit than everything else that drops.
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