Cut & pasted from the discussion thread:

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While this new plugin manager is far superior to the old updater,
it is still too confusing.  I suggest the following improvements:

 0. Clarify and simplify the terminology and use the same words
    throughout.  There are now "local", "global", "shared", "platform"
    and "userdir" modules.  Pick two of these and stick to them,
    for example "install into the platform" and "install into userdir".

 1. Clearly distinguish between the modules installed into the
    platform and those installed into the userdir.  There should
    be separate tabs for the two groups of modules in the plugin
    manager.  When a user uninstalls a platform module, unlike a
    userdir module, every other user on that system is affected.
    This should be made obvious.  It wasn't in 5.5.1 and we
    suffered for it.  There still is no indication in the new manager
    which modules are local and which are global.

 2. Allow "promotion" of a module from a userdir into the platform.

 3. On the "downloaded" tab allow platform or userdir installation
    on a per-module basis, the way it was in 5.5.1.  (This is a
    regression.)

 4. When "Install/Reload into Development IDE" is selected from
    the right-click menu and the warning window pops up, add a
    checkbox to the warning window to allow installation into
    the platform as opposed to userdir.  Rename the right-click
    menu item to "Install into this IDE", the target IDE can also
    be used for development so the wording is ambiguous.

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