Perhaps it's a bit late for this now, but it's something I just think needs to be addressed.
At what point did the SC community, and more importantly the developers, become so adverse to innovation? Because if you really think about it, there isn't much innovation to be found in the current build of SC2, especially compared to earlier Blizzard games. Updating the interface be more user-friendly or making non-idiotic unit pathing don't really count, that's something you expect from RTS games. And while new units and abilities have changed certain dynamics, the core concepts remain utterly unchanged from over a decade ago. Even then, some of the new items introduced aren't exactly...inspiring. "Hey, let's take a Scourge and remove his wings!" or "Let's have the player click a button every 25 seconds!"
For example, consider terrain. There is nothing stopping Blizzard from using their technology to do some really cool, interesting and engaging things with designing their maps. And yet we see the exact same "cliffs and ramps" scheme for all their multiplayer maps. Barring a few new doodads you could pretty much retain through liberal use of the world editor, there isn't a map yet that you couldn't recreate for the original game.
That wasn't the case when it originally came out. People then were worried about it not being the same as WCII, like the addition of a third race or lack of naval units, and look how things turned out. And it wasn't the case when WCIII came out when it introduced new ideas to its franchise, yet still became a huge success (cue rabid frothing fanboys screaming "no heroes in SCII!!111"). So why should attempts at breathing some new life into StarCraft be met with rebuttals of "No that's too different from the original!"?
Personally, it seems to be a combination of three things. The first obviously is nostalgia, which doesn't really require much explanation. The second is the culture that has permeated parts of the community itself. StarCraft was a great game. StarCraft definitely belongs on any list of great computer games in modern history, at the very least in the top 10. StarCraft was not a perfect game. It was not the be-all, end-all in terms of RTS games. There will come better games, and they will not look like carbon copies of StarCraft, or even close to the original. To quip "if it ain't broke don't fix it" is to surrender your creativity, and that of Blizzard's, to set in stone a system that could be made better if only the thought was put into it. Or an admission that Blizzard simply doesn't have the intelligence to innovate anymore, and should simply stick to what it's done in the past, whether good or ill.
The last I regard as the effect "eSports" and "professionals" has had on the game. These are people who have invested significant time into mastering every little glitch and trick of the original, who have memorized build orders and timed themselves on how quickly they can get them going, who have a vested financial interest in making the transition from SC to SCII as painless as possible so that their well-worn skills will allow them to remain at the top of the game. Hence ideas that could genuinely make SCII a great game are discarded because they could "negatively effect the competitive scene." Even though the "competitive scene" is so infinitesimally small compared to the vast majority of people who will buy the game because they want to have fun, not increase their APM count. It is a case of Blizzard appealing to the minority, based mostly on financial gains from the "eSports" arena, at the expense of everyone else.
Now if you honestly think that StarCraft is God's Gift to Man, that's your pejorative. However, Blizzard isn't going to force you to turn in your original when you buy the sequel. Hell, I'll put money on there being a UMS within six months that pretty much replicates "StarCraft in 3D", even going to far as to gimp things like unit pathing to get the original feel back if they can. Ideally though, the sequel should have been the time when you put on your thinking caps and ponder how to breath freshness into your franchise, what new ideas to incorporate and expand upon. It shouldn't have been a case of deciding which new coat of paint to put on your '98 Corvette so that it looks newish. Which unfortunately is how it looks like it's going to turn out.