Splunk Enterprise 8.0.1 was released on December 12, 2019.
It's very important information, due to the critical bug: https://docs.splunk.com/Documentation/Splunk/8.0.0/ReleaseNotes/FixDatetimexml2020
We should update our installations while we still have some time or downgrade our cluster version.
There's currently patching process documented at https://docs.splunk.com/Documentation/Splunk/8.0.0/ReleaseNotes/FixDatetimexml2020.
This fix works regardless of the versions, and till 8.0.1 is release, should be used to patch your existing systems. Instructions for how to deploy and test that the patch is applied is in the above link and should be followed explicitly.
Regarding the 8.0.1 and 7.1 releases, its not just a patch for the datetime.xml, there are other bugs that our QA and engineering teams have spent a lot of time resolving that will be in the releases. Again, if you just want the patch for the datetime.xml issue, you can follow this link : https://docs.splunk.com/Documentation/Splunk/8.0.0/ReleaseNotes/FixDatetimexml2020.
For 7.1 and 8.0, the next releases are still going through GA, so release dates can't be confirmed but the target is middle of December.
We understand your frustration, it's shared. Please talk to your account representative and express these concerns and make sure your voice is heard! It helps us also to improve our processes.
I don't have the answer about when... but there will be a new version of ES. Keep an eye on the compatibility matrix: