Comment 2 for bug 703067

the older clutter unity in 10.10 only shows 1 arrow (even with multiple windows of the same app), that saves space, but does not give the information..

one good solution i believe is what dockbarX gnome applet does to save space: print the Number of open windows/instances. Looks very good too.

examples:
http://fc01.deviantart.net/fs71/f/2010/212/4/c/dockbarx_popup_mockup_by_BigRZA.png
http://kernelreloaded.blog385.com/sadrzaj/dockbarx.jpg

something similar could be done. Maybe merge the arrows into one (making it look bigger or "hotter" color) when multiple windows and icon is folded/stacked , etc..