While not essential, I think this should be considered as a feature for IPB 3.

Sorting threads just by clicking on Topic Title, Replies, Topic Starter, Views, and Last Action. I found it made sorting threads a lot easier when I was still using vB.

I don't get what you're suggesting.

Basically, on the forum list you know how there's the row headers? If you clicked on, say, "Topic Title", it would automatically sort the forum based on the topic's title, and clicking on "Topic Title" again would then sort in the opposite order.

Not really an essential thing, but it is certainly something that's pretty nice.