For multi-page forum threads, the page index can only be found on the very bottom of the thread:
It is very inconvenient to scroll all the way to the bottom of the page just to go to a different page, especially since you can only hit the reply button on the last page. I suggest adding the page index to the top of the thread as an easy QOL fix. Adding the reply button to every page, rather than just the last page, would also be useful.