The only Windows 7 menu feature I've found so far which Start8 does not successfully duplicate is combining identical items into one. The big advantage of the start menu over the start screen, obviously, is being able to do hierarchy and sort things according to one's own organizational scheme. However, plenty of programs belong in more than one place in a menu hierarchy, and in Windows 7 handling this was as simple as copying the shortcut to multiple places in the start menu folder. If you hit the windows key and started typing, the Windows 7 menu was smart enough to recognize that these copied items were all the same thing, and display each distinct item only once. Start8, unfortunately, displays every single one of these as a separate item, even when shortcut names and destinations are identical. It would be really nice if this weren't the case.
Another thing I'd like to see, and maybe I'm just missing a configuration option somewhere, is customizing the number of results shown. There is space on that menu for a whole bunch of items, but it always shows me only 5, with tons of wasted blank space underneath. Since several of those might be duplicates as mentioned above, and there's no way to scroll down or otherwise show more (the "See More Results" link does something completely different; a windows explorer search that mixes in files and all sorts of things I have excluded from my Start8 search), I'm stuck having to type out much more of the name of whatever I'm aiming to launch than I would otherwise have to.