It's all been noted, right now we just have what the forum software gives us and make the best of it. DPRev is currently primarily based around the forum, but as I understand the underlying platform we're using can be extended to serve other content when we get there...
We've already had some customisations made by the team here, and others will likely come in time - but some features may wait to come from the forum software project (Misago). I believe two examples they're working on are thread view, and notifications.
I'm also not wild about the categories page, but find the "threads" page is a better way to get the "pulse" of the site, and you can use that to filter down to categories you're interested in (and bookmark).