I'm throwing my hat in the ring for custom avatars and signatures. The customization we had for our profiles is something that many enjoyed and really helped in distinguishing each person from the next. On this new forum if you're not an EA staff member or a certain rank you're stuck with a paltry amount of pre-selected avatars.
Maybe it's just me, but it really gives the feeling that If you're not one of the top users than you don't deserve the option to have further customization for your profile and can only use what the forums have chosen for you. But I could be just reading too much into things.
Also please bring back the sub-forums for the Sims 3 section. It took me a while to figure out that some of the migrated threads such as "Post the last screenshot you took in Sims 3" and "What are you doing in your Sims 3 game" were in the Sims Franchise discussion. It would be so much better if everything Sims 3 related was in the Sims 3 section rather than spread out between multiple forums.