Not that it’s a good thing, in fact it’s one of the main industry complaints; but you do realize that the video game/movie industry is kind of messed up and this is normal, right? That’s not just ActiBlizzard being a douche. Most big media producers do this. I was a graphic designer before I became an art teacher.
When you start a big project with a company, like for example, doing art/character designs for a video game or a Disney movie; everyone doesn’t stay hired until the end. Sure you keep the main stars, but the little guys doing things like shadow quality and other minor, (but important) background things come and go. For example, there might be a lot of artists at the beginning when concepts are thrown around. However, after that phase, when we pretty much know how the characters, environments, etc. look, 90% of the artists are either moved to another project, or laid off and go looking for another contract because they aren’t needed anymore. It’s normal. It’s the same for voice actors and other media specialists.
We’re talking about an industry where companies being forced to give voice actors breaks every 3 hours (where they often have to yell or do other energetic lines during that time) was considered a landmark case.