I was having the same slowness issues in the wordpress editor. I went through the process of deactivating plugins the activating. I found it was the Spectra Pro plugin causing the slowness issue. Now it is deactivated, I don’t have the slow editor issue. But, I don’t have the added functionality of the Spectra Pro plugin.
After upgrading to 2.0, all my links would redirect to the home page. I successfully rolled back to 1.9.13, but I really wanted the new features in 2.0. All is good now as before the upgrade.
Running WP 3.5.2 Easel Theme
Chrome Version 28.0.1500.72 m
http://www.jomtiennightlife.com
Interesting fact: I’m also running the same WP version and Theme for another website: http://www.isaanexpats.com – and everything is working fine after the upgrade to 2.0.
Same host, server, etc.