The main thing I do not like is the loss of the column on the right that showed whst section of the forum a post was in. For instance: I could scroll down each page and check the forum quickly for each post in the "For Sale" secrtion. Or, I could look quickly for all posts in the "Irrigation" forum section. Now that info is "buried" in the middle of the page in amongst all the post titles.
It makes the forum a lot less user friendly for me.