One more important thing i feel for the xenForo. Here it is:
Create a link at the bottom "Show More Threads" instead of numeric pagination then Clicking this link should show twenty more threads right under it (so the forum index then shows 40 threads instead of 20). Clicking on it again then shows the 20 next threads (so 60 total). Etc. Every click is twenty more threads that show up. This link must be both on the forum index as well as when viewing categories.
Can anyone help me?