[e]Wingpanel had come back with panel-ish style...
The current my elementary-borderless theming also improves wingpanel style!! :)
The latest wingpanel showed on top of screens. yeah it seems like classic gnome-panel-ish dark gradients.
so if you guys wanna use global gtk theming style to wingpanel, set it via "dconf-editor" (like my shot). :) and enjoy!!