I couldn't agree more with the above! I felt both SC2 WoL and D3 fell short of their predecessors. "Unfaithful to existing lore," is a perfect way to put it. Despite what some people are saying above (the theme of every RPG is kill the bad guys) the D3 story lacked originality and I found myself bored after the first play through. I played D2 for years, D3 for a few weeks.
As a result of the predictable and recycled stories Blizzard has been putting out lately, I have refrained from purchasing HotS and I probably will not purchase D3 expansion when it is released. Blizzard, you had a good run with me over the past 20 years, but unless you hire some good story tellers, I might be calling it quits.