While the navigation tree and breadcrumbs are undergoing some consideration in other threads, I would like to re-raise the issue of disabling painfully-slow-motion animation of the site map's treeview.
Although the site map is
somewhat useful as a site structure map, the fact that it's on a separate page means that it's no replacement for the nav tree that appears on the content pages. Site map's navigation utility is further limited by the fact that on first visiting it, it's completely collapsed, so the user has to expand nodes one by one to learn anything. A process made very slow by the slo-mo animation.
So the main utility I find for the site map is during tidying of the site structure, including reparenting some pages, and refining page names and URLs. Having renamed one or more pages, I want the new name(s) to appear in the site map, for which a page refresh is necessary. Which shows a completely collapsed tree. Which requires once again clicking on a bunch of nodes to get back to the display I was using. Which means suffering possibly dozens of the slo-mo node expand animations.
Needless to say, the slo-mo animations are not very endearing.
Also it would be helpful to have a site-map refresh button/function that remembered the current expand state, and tried to reinstate as much of it as possible.