There are a few things about this design that I feel could be improved. This all has to do with user friendliness.
Elements that are used frequently by the end user should have prominence within the page. For this page, the user is most interested in seeing the mods/collection/media that the author has created. The sidebar that includes the authors information is not used most of the time by the end user. For instance, the end user does not have a need to use the "follow" feature very often. Thus, this feature should not be given prominence within the page. Placing the items in the sidebar within the header like the old design was a better choice. If this was moved, there would be more space for more mods, which is what the end user is looking for in the first place.
The number of items per row is too few and the space between items is too large.
The design is not reactive to the size of the user's screen. Larger screens should be able to show more items per row up to an default row size. Please note that 3 items per row is not a good choice for a default on modern screen sizes.
There is no ability to sort items by "last updated". This forces the user to visually search for updated mods, and since the font that shows the last updated date is very small, makes this process not very friendly.