A friend of mine stayed in my apartment for 3 weeks while I was away, had access to my media computer.
This is a smart guy, years of Java programming experience, admins his own webserver, builds his own computer, compiles Linux, etc. So not a computer newbie by any means.
He gave up on MC11 after 2 days, and downloaded another program instead to listen to music.
His specific gripes (which will not be news to anyone who's read my posts):
1) Naming of stuff - use of nouns and verbs is inconsistent - most actions are treated as verbs, but editing tags, a very common action, is called "Tag Info" - should be "Edit Tags" or better "Edit Info about Song|Image|Video" or "Open Tag Editing Window". Also a lot of stuff is very inaccurately or abstrusely named eg. DSP Studio, or "Acquire Images" which seems to suggest buying stock photos. Pressing F2 is an action called "Rename" but most users would say that it is really "Edit field" or "Edit info about selected item" - the immediate assumption from the menu is that it renames a song (only the name).
Now - some of this might appear to be nitpicking - but my friend comes from an environment where precision is important. So if you have a menu item called Rename, with shortcut F2, the assumption is that it will do exactly what Rename (F2) does in Windows Explorer - rename the file. Since there is another item about editing tags, it seems reasonable to assume that F2 is in fact a rename option.
In the same way, he figured that the DSP studio must be some way of directly controlling the DSP in my (rather advanced) soundcard.
2) Redundant submenus - eg. Action Window/Build Playlist -> Build Playlist, Player/Playback Options -> Playback Options...
3) Can't find obvious functions - eg. turn crossfade on and off
4) Hard to establish what the various views do, and when they are applicable - specific complaint, why can't you apply a view to a playlist. I explained using Playlist as a filter in the search box, which allows this, but he pointed out that most users would not consider this a "search" function.
5) Role of Playing Now vs library views - here an easy solution is proposed, the little yellow triangle icon in front of Playing Now should reflect playing state (ie change to square when stopped, two lines when paused), and maybe pulse when active.
6) Start page considered completely useless, the functions present there should be moved to the Action Window or the About box. (The Start Page has not changed materially in a year, and doesn't do anything useful.)
7) Confusion about playing images and audio at the same time - no obvious way of seeing what images are cued.