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
). 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).