1) Alphabetical sorting in Finder, but separately for files and folders.
2) A tabbed finder with a dedicated refresh button. 2 panes PLEASE!
3) Ability to quick look in stacks and spotlight results.
4) Ability to right click on items in a stack and spotlight results.
5) Ability to close windows in Expose mode.
6) Better intelligent contextual menus.
7) Unified marble interface.
8) Hot-swap support for iPods.
9) Built-in uninstaller for programs that removes residual files.
10) A simple image and video browser like "Windows Photo Viewer".
1) Finder ONLY displays files and folders. Nothing else. So you're saying apply alpha sort to NOTHING? smart...
2) Finder is REAL TIME. Windows is FAKE TIME. No refreshing needed for the former, but the latter needs to be thrown into a dumpster where it belongs.
3) Stacks is an alias of sorts. It simply redirects the stuff in a Folder to the Dock for quick access. Unless you have many files similar enough, it's not needed.
4) Spotlight is to search for something, if you already found it, why search for it?
5) Is it that hard to just click the window and then close it?
6) AI can only go so far...
7) It's unified already. If you want to rid the aqua UI, just change the appearance to graphite in system preferences.
8) It's hot swappable for me.
9) Most programs leave only a .plist file. And the ones that don't usually have an uninstaller, like Adobe.
10) Windows Photo Viewer is fail, and Apple has Preview. It may not view every single file format, but it does do the vast majority.
Sorry, but most of your suggestions don't make sense and/or already exists.