Do you have a better idea then this?
P.S.: Zerg players! You should totally check this out! You will like it!
This is an excellent example of what Blizzard needs to take deeply to heart to get Starcraft back on the path to perfection. Put some science into the fiction.
For the most part Starcraft is void of actual real scientific content. This is actually normal these days. Successful SciFi titles such as Battle Star Galactica, Star Wars & Fire Fly don't have a lot of science in their sci to fi ratio. But adding real scientific terminology & actual truth is stranger than fiction biology-engineering-chemistry to the game (like the op suggested) will work wonders to restore the suspension of disbelief that blizzard has lost. No nerd is gonna geek out on Galactica their whole life. No professor is going to reference an episode of fire fly during a lecture. If a professor did reference anything in lecture it would be a Roddenberry episode of Star Trek or an episode of Dr Who that is older than the students hearing the lecture. There is a great opportunity for Blizzard to expand & strengthen their audience just by pumping some science into their fiction, like Myth Busters.
Blizzard clearly had no intention of "getting real" in the first place. Starcraft is born of very stylistic artistry, not scientific accuracy. The creators are more focused on the novel artistry of things rather than their practicality. Meatalopolis is a battle atop skysc@#%!rs, cool idea, but it's not something that will ever happen. Pretty stylistic artistry is what Blizzard has tried to be good at & therefore succeeded in being good at.
They have not tried to "get real" therefore the game doesn't hold up to critical minds well. Anyone trying to find scientific holes is going to have just as easy a time as someone trying to find plot holes.
On the other hand if Blizzard did try to "get real" then alot of the plot holes would close as well. By constraining their story to actual known scientific reality they would have rules to follow, & by following & detailing these rules they would then expand their audience & give their existing audience a chance to find the story believable again.
Anyway let me wrap up, I know long posts don't work well with these attention spans.
If you add real Biology to Zerg, good things will happen.
If you add real Engineering to Terran, good things will happen.
If you add real Physics to Protoss, good things will happen.