Well as far as creative direction goes from what I can find out, Starcraft was lead by Chris Metzen and James Phinney. James Phinney has since left when the ArenaNet guys broke off from Blizzard...
Chris Metzen is of course still at Blizzard, but who knows how Phinney's absence, or Chris Metzen's distraction with the Warcraft universe has affected the game.
That being said, I prefer the current story-line personally. There is more time spent on character development, rather than pushing the story by at a ridiculous rate. I actually feel like I'm playing through a deep story, rather than playing a game that has a story there if I want to pay attention to it.
In all honesty when I played through the single player of sc and bw all those years ago, I didn't really care for much of it (except for Tassadar, he was boss). Especially the stuff with Kerrigan in BW, it annoyed me how much everyone trusted her even though it was obvious she was gonna stab them all in the back.
Basically, rose tinted glasses, it wasn't that good.