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The price for the heavy knothide leather pattern remains the same. Moving the pattern from a vendor to a profession trainer just makes the pattern easier to find.
The skinning change increased the dps rating of characters with this skill. It also benefited to a healer by providing a boost to his healing capabilities. Characters who specialize in DPS may choose to learn this skill simply because of its in-game benefit. If the stat boosts were removed from gathering trade skills, the change would irritate power gamers.
Some Wrath of the Lich King leather working recipes could have been revamped to make the armor produced by leather workers more desirable to other players. This would in crease the profitability of trade skills. Trade skill items usually return a small profit when a player sells crafted items to NPC vendors.
The patch does not change that most players who pursue leather working do so because it benefits their character or their guild. Leatherworkers are mostly disappointed by the lack of changes patch 3.2 made to this skill.