This is a problem in the web ui creating additional node pools, there is a very simple workaround to use gcloud. What major impact are you referring to?
It's likely the fix is checked in and will start roll out on Monday.
Disclaimer: I work on Google Cloud and while I believe we could use more words here, this doesn't seem like a huge problem. It's embarrassing the the issue with the ui was shipped, and I'm sure this will be addressed in the post mortem as well as whether it could have been mitigated quicker than a roll forward.