I just miss two things: one, the proper handling of the d-pad. I liked being able to browse pages lynx/links/elinks/you get the idea-style: jump from link to link where available, and scroll if there are no links. On my MicroB with pages with no links, the d-pad does nothing on short presses. Along these lines, I also find a lot of pages where some links can't be hit with the d-pad --- no combination of presses reaches an element --- and some pages with lists of items where one item can only be accessed going down, or going up. Left and Right / Up and Down should always, always switch between the same two elements...
Adblock causes dramatic startup slowdowns for me, takes multiple seconds per click when being configured, and adds a second or two to each pageload. I guess I don't use ad-heavy sites?