A button at the top of a thread to go to the bottom of the page to get the latest reply. And conversely, a button to go to the top of the thread. Saves on scrolling, especially in image heavy threads
Do the Home and End keys on your keyboard not do that?
Plus.. at the bottom of each page there is the white arrow in the orange triangle that takes you to the top of said page.
As for the rest, I have zero coding skills so I am limited by the software I use.
It is plug and play additions to the basic kit.
Topic tags may be available as a plug in option though.
I agree the thick line or something would be nice to distinguish the OP when on additional pages, still I am used to it now and I know what is what.