Personally, I thought the ending was neat.
Truthfully, as bad as the leaked ending was, the dialogue was better and the ghost-control device made so much more sense than using the Xel-naga Artifact(wasn't that suppose to strip all her powers?). Not to mention that the ending was alot more adventurous on the leaked storyboard rather than the hunt for Amon we have currently.
Question is why did you choose to change that ending for the worse Blizzard?
Actually, the new version makes perfect sense to me. Because of one thing... Kerrigan has been infested and altered on a genetic level, several times
now, and no one noticed the device meant to kill her in her head? Abathur would've freaked the hell out if he saw it, providing absolutely no benefits to the Queen of Blade while she was being spun.
So one of my issues with the current ending is that Mengsk's dialogue is the same
as the leaked ending. When it was "killing Kerrigan with a device implanted in her long ago," "You'd think I'd keep an animal like you close to me without some kind of insurance policy?" made sense. Now I feel it'd be more sensible as "You'd think I'd let an animal like you close to me without some kind of insurance policy?"
And the Xel'Naga is an artifact that probably has several uses for it, such as destroying huge swaths of Zerg. Valerian and Jim used it to cure Kerrigan. Arcturus decided to use it to kill her. It might not even be able to cure her now.
Also, Blizzard made this ending better if anything. Kerrigan going on about how the Swarm serves no one, how she'll help them find their place? Cutting that out, having Kerrigan thanking Jim, and flying off into the sunset was simply better
Cataclysm storyline makes the HOTS storyline look like it was written by George Orwell.