Like:
- The top right is more minimal. I like that.
- The map feature, while a nice touch, was(is?) fairly useless. If it relieves lag to remove it, that's great.
- You left a lot of things alone.
Dislike:
- The blue used for the top right. Who picked that and why? It makes it look very disconnected and out of place in this layout. I would stick with the current colors (beige and white), as it seems to fit better.
- Floating footer; probably a sign that the designers spend a bit too much time on Facebook. Okay, you want to focus on the social aspect, that's great, just come up with something that isn't a direct ripoff of other sites. It's also annoying to deal with, clutters the page, and probably adds more lag than the world feature did.
- Notices for PMs and comments now part of the floating footer? Friends online now display on the footer? Hmm, gee, what other social networking sites do we know of that use that same exact layout? Please don't change the bubbles, they're fine where they are.
- If you absolutely refuse to come up with a different idea and go ahead as planned with the footer, a closer matching purple would look better.
Overall, this feels very unoriginal, plus the additions seem tacked on and out of place. It seems very few people like the footer, so hopefully that gets reconsidered and at least becomes an optional feature.