Battle.net has details from Blizzard about the imminent conclusion of beta testing for Legacy of the Void, the upcoming final chapter in StarCraft II. They say they've gleaned lots of valuable information from this, and offer some end of beta suggestions for participants:

From reporting on large issues like game balance, pacing and competition, to bringing up smaller things which deserved more polish, you've all been tremendously helpful! We've pored over your feedback and gotten some truly rich data as a result.

Now that the beta is ending, we’ll soon be locking the beta feedback forums. If you have any additional feedback to share, we suggest that you write your final post(s) there as soon as possible.

Additionally, we recommend uninstalling your beta client, as the retail version of Legacy of the Void doesn't use the same files as the beta. To do this, select “Beta: Legacy of the Void” from the dropdown in the Battle.net App, then select Options > Uninstall Game. Doing so also gives you back around 13 gigabytes of hard drive space back. Hooray!