Paul Neale has recently shared a nice article that discusses different facial rigging methods.
The artist states that you shouldn’t be trying to define what the facial rig will be. Instead, you should kick things off by defining your production needs. “Almost never do I see this question accompanied by a clear understanding of what will be required from the final results yet person after person, as well-meaning as they are, gives them the answer. This is often the very first problem as the solution cannot be defined if the problem that needs to be solved isn’t well defined,” pointed out the artist.
Please note that it’s a bad idea to define as “it’s a game” or “it needs to be really high quality”. Neither of these will help you achieve anything.
You can find the post here. Make sure to discuss the article in the comments below.