Alright, then my first post within this thread still applies.
If you sent a ticket using the form I linked, then you will have to wait approximately two business days for a reply from Fandom Staff.
However, it is feedback, so don't expect an immediate design overhaul for the category boxes. They will just take your feedback, and the feedback of many others, into consideration in the future when updating the design of Fandom's wikis.
Meanwhile, you can always use CSS to change the design of your wiki as long as it adheres to the customization policy.