After upgrading my production vCSA to 6.5 Update 1d a few days ago the complete handling of the vCenter is quite good. The HTML5 Client runs very good, but don’t have all features, so the Java-based Web Client must do some of the work.
One very disturbing thing is the “Your password will expire in xx days”-Message everytime you log in.
But it doesn’t have to. You can configure the time before the reminder appears.