They're rolling out a more limited version of the recent site layout changes they tried a few months ago. Those were terrible, and this one is slightly less terrible, because it looks more like the old layout. In other words, the less they change how this site looks, the better. In other words…
STOP. TRYING. TO. CHANGE. THE. SITE. LAYOUT.
The old style is just fine, the new style is not. Stop trying to ruin your own goddamn website. You would achieve better results by literally doing nothing. So do nothing.