I believe it was the placement of the favicon in regular search results that was reverted because it appeared in the same place as the word "Ad" in the ad.

Hah, my tired brain didn't even clock that consistently wasn't there for the actual results. Which I guess also says something about it being a clear distinction...

(DDG seems to do it the other way around: results have favicons, ads have nothing in that spot. anyways, adblocker back on)