Well, Blood Tap was changed when the talent tree of rune options was implemented. It used to just give you a death rune when used, and had a 30 sec cd.
And it's likely that we seem in a good place all the time, but I'm sure there are changes that could always makes thing better. Like diseases, why are there two at this point? The DPS specs both have masteries that affect one, but not the other. Each one no longer has a neat special property. They're just something you apply because it's required for another ability to do 100% of its damage. Why not just cut it down to 1 disease?
They just mentioned having a plan for changing runeforges, which I think is a long overdue talk.
There's just so many things they could go and touch up, but it doesn't seem needed to us because life is usually always just fine as is :P