Why this whole gap in the middle, along with the (imo) unnecessary block on the right?
Inspecting the page I see that the block on the left is only taking 28% of the width. Why not 100%?
And all the info on the right, along with the install button (why do we have 2 on the same page?) can go to the left, above the box (with the appropriate spacing, of course):
Also, if you notice, the box on the right still says “theme(s)” even though I’m in the Components page.
And I think that having the description below each component is useful and should come back like the previous version.
One last think: having a scroll inside a page that scrolls, never made much sense to me, unless very necessary, like the sidebar for example. In this case, the list of components or themes don’t need a scrollable box around them. Just let the full page be the container. Similar to Wordpress, for example.