This updated Release introduces a new setting as an additional way to customize Rocket!
The tight layout setting -- if turned on -- moves all items to the centre on the last page (unless the user is searching). If turned off, all elements are lined up from the top.
You can get the new binaries from the KDE store: store.kde.org/p/1507169/.
Please do so, so that I know how many people are using Rocket!