Over the last week, we have achieved a level of stability, although we are continuing to work to improve things.
Desktop is in a better place than mobile. Japan is the most challenging at the moment.
We are currently fetching page 1 for all sites / all keywords at the moment. For desktop, outside of Japan, we are currently able to fetch the top 5 pages about once every 5-6 days. We have implemented our sampling regime to provide coverage at the sub-page level, meaning that the core ranking data shouldn't have major gaps on a day to day basis.
AI Overviews are a challenge as well, and we are working to improve coverage here too. As with the rest of the situation, mobile is more of a challenge than desktop is.
We have also started to see indications that Google is returning spurious results in the SERPs. This is not yet fully widespread but it is also on our radar and clients should be aware that this is happening.
As always, we appreciate your patience and are happy to schedule a call with any customer to walk through any questions.