Many of the previously missing icons are now present, but some are still missing. In my layout, the following are missing:
Wireframe, Isoparms, (those two bother me the most) Skeleton, Display Filter, Save as Startup Layout, Close Project, Close all Projects, Go to First Marker, Go to Previous Marker, Go to Next Marker, Go to Last Marker (To be fair I never use those marker buttons anyway and should remove them from my layout) Use as Render View, Go to First Key, Go to Last Key, Lock Camera Pivot, Calculate FPS, Frame Project Settings, Frame Preview Range, Go to Start, Got to End, Frame Range, 50%, 200%, Show Text, Show Line, Pixel Aspect, Vertical Tags, Object Information, Convert Object Selection to XRefs, Unfold Selection, Fold Selection.
Wow I wasn't expecting this list to be so long, but to be fair again many of those last ones I listed I use text menus only and I just turned on the icons to see if they were there or not.