Its kind of sad that many people REALLY do not like Thrall or want him in the story anymore, each time I mention how I want him back or want him as Warchief people shoot me down. I definitely understand where they're coming still sad considering Thrall was once really beloved.
A character is going to take our kills in the Lore. Kind of the point in World of Warcraft - we just weaken them. Illidan, Tirion, Thrall, the Dragon Aspects, Khadgar. They get the credit in killing. It's nothing new and its staying. Thrall isn't worth this hate regardless.