Google is pausing the accessibility ban on applications for now until it can figure out if some app developers actually have a reason for needing the accessibility API for certain features of their apps to function. There are indeed some apps which do need the accessibility API for a feature or two, such as the Tasker app which needs the API for its automation functions, so it might seem a bit ironic that apps which do make responsible use of the API might end up having their access to the accessibility API revoked, basically having no accessibility at all.
Initially when Google announced the changes in an email to developers in the middle of last month, it gave the app developers a 30-day time frame to make the necessary changes or risk having their apps banned from the Play Store until things were fixed. 30 days would be coming up within the next week or so, as the notification from Google on the ban started hitting developers around November 13th, and it's now December 7th. Now that the ban has been lifted though developers will seemingly have some extra time to convince Google that their apps do need the API in order for certain features to work.
Google has been sending out new emails to affected developers so that it can explain the reasons for pausing the ban and what developers will be able to do about the whole thing. Google is stating that its decision to pause the ban will give it the ability to "evaluate responsible and innovative uses" for the API as used by apps. Google doesn't specify how long it will take for it to evaluate the uses for the API but it does mention that the 30-day notice will essentially be reset. According to Google's email that is being sent out to developers, the ban is not only paused while evaluations are being done but the 30-days to make any necessary fixes will start once Google reaches back out to developers following the evaluation, and this is only if any changes need to be made in the first place. If not, then developers should be fine and can leave things as is.