I was against the removal of the "all media" Media Library branch. I understand the need for simplified interface, but the current system is not clear for newbies (and some oldbies too
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). Now new users might not realize that MC is capable of handling various media types at the same time.
At least MC should have a more intuitive way for creating new root branches. Perhaps the option could be in the usual right-click "add view scheme" dialog, e.g. "Make this view scheme a root item".
In regard to the "~a" (all databases) expression I guess you used it before too. I don't think the TV channels have been included in the main database previously (though, I can't be sure. I have only 11.1 installed).