Don't over do it, the simpler the better.
Remember the pagination option for game lists. Remember
Login/Register links on top navi. There should be comment listing
(comments are basically single liners). Game descriptions should not be
visible on game lists. On footer there should be a list of most popular
games for SEO purposes. Thumbnails are 128x96 no other sizes should be
placed on entries. Avoid sidebars.
FYI: You don't have to redesign the whole page from scratch. It might be enough that you just add your professional touch to it.
I would like to keep the overall color scheme of the page so the switch doesn't shock our current users too much.
There should be a section for the welcome text as there is currently.
Keep the top bar full width
Try to keep the content body width 728 (doesn't include padding)