(and where do I find "simplicity"?)
The new installation has five different layouts available to you. You can choose your layout by going to your Profile, then clicking on "Look and Layout Preferences" on the left hand side. You'll see a screen come up that says "Current Theme: SMF Default Theme - Core (change)". Click on the "change" link to choose from the other available themes. Thumbnails are provided.
Also, another new feature that may interest you is that new posts remain new across sessions, so that if you don't get to everything in one go, it will still have the little "new" flag next to it when you come back the next time. I know you requested that right at the end of the life of the old forums.