Thanks for the feedback. I've marked this for PM to review.
Donald, glad you like where we are going with it!
As you know, we have several customers who work with 6500 (and it worked in our lab as well). Obviously there are some cases where it is a problem, we are working on correcting any of these issues as we find the root cause.
Same deal with the Nexus. We focused on resolving all known issues in the beta and in our lab for HP ProCurve and Cisco Catalyst lines. The Nexus 7k works and we are looking in to the 5k (with your help).
Yes, there are some issues with layer 3, we have made some changes to allow users to manually specify their layer 3 connection, but long term we will make this better.