Eliminate the "comments" section on the skin pages. It's often just used to post questions, which the commenting system is ill-equipped to handle. It doesn't add much value. I'd put the "releases" section in that area, instead.
Provide option to disable mobile version by default for the entire account.
Get rid of "top users" panel in the forums - not useful, and it often just coughs up the names of long-departed posters. I haven't found anything in the admin controls to do this, however, so we're probably stuck with it.