David Schuster was about as good as they come when doing straight reporting and analysis, but a bit of a loose cannon when ad-libbing or trying to conduct a discussion and offer 'opinion'.
Keith Olbermann gave the incident and Schuster some pretty harsh remarks and added profuse apologies for the network last night.

I was impressed that MSNBC acted so swiftly and strongly.

I did see Schuster's 'apology' in an online video, and found it pretty weak. I'm not sure what they ought to do....and I doubt the network is either...yet.