Over the years, WoW has streamlined certain things. Mechanics that might have once made sense become hindrances to play and become frustrating. Special trainers in hard-to-reach places and leveling Lockpicking and weapon skills have all been removed or changed. It was with this in mind that I began to think of what current mechanics should be dumped, as well. The thought came to me while attempting to do the Dalaran fishing daily Disarmed with a fishing skill level of 156; the fishing skill is about as obsolete as weapon skills and Lockpicking skills.
Think about it. The fishing part of the game is boring and something which Blizzard implied it would make more interesting in Cataclysm. Whatever it meant by that, fishing's still boring and tends to get neglected on alts. When we all log on to WoW, our attitude is not "Oh boy, let's level fishing!" For $15 a month, we want to actually have fun doing things, and fishing is pretty far down on the list of fun things.
On the other hand, we don't want some gold farmer corpse-dragging a low-level toon out to a place where there are fish that sell well and start bot-farming the fish, either, so we can't just remove skill ratings altogether.
So why not make fishing work like Lockpicking? Like the rogues, we would go up five skill points per level and could fish where we can play, but not where we're not supposed to be. We have one less annoying mechanic to worry about that forces us to spend time doing something we'd rather not do.
So what mechanic would you like to see changed or eliminated?