I think that there are two extremely important things to do.
First of all, move back all the posts and users that are missing. After such "upgrade" many of my friends do not exist anymore in the users database. Neither around 600 of my posts made during the last year. I guess I'm not the only one, am I?
Secondly, move back smiling asian faces in the header! At least to me, those were the brightest association with TestMagic ever. At least Erin, I think you should make photos of other people if you don't want those. These students were good representation of the idea of "preparing together and successfully passing the test". That's how I see it so far.
Surely, there are a lot of other ideas, but in my opinion, those mentioned now is that has to be done in the first place.