One thing I would say is a downgrade of quality for MMOs is the removal and streamlining of stuff like Talents and Specializations... Everyone is the exact same, the most you seem to get nowadays is pretty much choosing between 2-3 different skills...

But I do suppose it's very hard to make it so that it all stays relevant and balanced, those kinds of systems do often tend to run into the problem that there's things that are clearly better and everyone just does the same build...