Hi Piyush,
If you have any questions on some of these remaining ones, it's pretty easy to look in the old version's default themes where the brush was used and then see how its used in the new version's default themes.
For instance, then you can see things like how the various ScreenTip* brushes now use themes:AssetResourceKeys.ToolTip*. There are a number of Window*, WindowTitleBar*, Edit*, DockingWindowContainer*, and NavigationPaneHeader* brushes that are used for most of the rest in your list.
I believe the status bar slider track is now: StatusBarSliderTrackHorizontalBackgroundNormalBrushKey.
The rest of your mappings look pretty good offhand.