Unveiling StarCraft II: Heart of the Swarm

Sarah Kerrigan returns with a vengeance in StarCraft II: Heart of the Swarm, embarking on a quest to regain her powers and make the galaxy fear the zerg once again.
You can now get an early glimpse at the first StarCraft II expansion in our new Heart of the Swarm preview page. Learn more about the key gameplay concepts, discover the game's story and major characters, and check out a fistful of brand-new media including screenshots, trailers, and more.

Changelings can't capture buildings, observers can't capture buildings, scans can't capture buildings.
Please read the whole comment instead of stopping at the word "spy" assuming he was talking about an observer unit.
1, Every Zerg unit should have an alternative that it can morph into.
2, You should be able to spread creep more easily from a macro management standpoint.
3, I want the defilers & lurkers back. Personally I think Lurkers should gestate from Roaches, & be able to move while burrowed but regenerate roach-like while un-burrowed.
I also think Defilers should gestate from Infestors, be able to move while burrowed, & have their insect swarm ability work as an mp sapping time cast that affects an aura around the defiler, a wide aura if un-burrowed, & a position revealing but ramp covering diameter aura if burrowed.
4, I really think that Blizz should inject a ehavy dose of science into their fiction to help spread the audience base. It's kind of childish to invent the thing "infested" when there is a real concept of recombination that works just as well (better actually.)
5, Aesthetically id like Blizz borrow from Todd McFarlane less & H.R. Geiger more.
just for the campaign, i wanna see if they could pull it off. also who thinks it wouldnt be cool to control a little jumper zling that could kill a banshee