It looks like Google wants to change the code in Chromium to alter how ad blocking extensions work in Chrome (and possibly Chromium-based browsers). Is this something that would impact Brave, or does your ad blocking work differently enough to not be impacted by such a change?
Also worth mentioning that Brave’s Shields are not actually an extension. Shields are natively implemented - making changes to how chromium interacts with ad-block extensions shouldn’t actually effect Brave at all.
Thing is when I was using Brave Beta I continued to use uBlock Origin and uMatrix as I have used them across multiple browsers for a year or 2. I just disabled Brave shields sorry. Alas I had to revert back to Chrome in December due to logged and reported issue with YouTube live stream notifications not working for Brave Beta. I keep checking the github report for updates and subcribed to it. Would prefer to use Brave but I make extensive use of this feature.