It's happening. And not only for StarCraft =)
http://us.blizzard.com/en-us/company/careers/posting.html?id...
http://us.blizzard.com/en-us/company/careers/posting.html?id...
http://us.blizzard.com/en-us/company/careers/posting.html?id...
http://us.blizzard.com/en-us/company/careers/posting.html?id...
(I used to be the lead developer of Ares for several years, the amount of reverse-engineering and C++ voodoo involved was awesome.)
1: http://ares.strategy-x.com/
2: https://ares-developers.github.io/Ares-docs/bugfixes/type1/i...